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510 - Mathematics 20,215
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570 - Biology 16,204
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590 - Animals 15,648
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550 - Earth sciences 10,978
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530 - Physics 9,570
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540 - Chemistry and allied sciences 8,314
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580 - Plants 7,986
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500 - Natural sciences and mathematics 6,031
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520 - Astronomy and allied sciences 3,983
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560 - Paleontology 1,584
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620 - Engineering and allied operations 200
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630 - Agriculture and related technologies 151
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610 - Medicine and health 140
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330 - Economics 77
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360 - Social problems and services; associations 70
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080 - General collections 66
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300 - Social sciences 59
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910 - Geography and travel 48
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600 - Technology (Applied sciences) 38
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010 - Bibliography 37
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000 - Computer science, information, general works 34
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660 - Chemical engineering 24
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970 - History of North America 18
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370 - Education 14
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790 - Recreational and performing arts 13
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150 - Psychology 12
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920 - Biography, genealogy, insignia 10
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020 - Library and information sciences 9
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350 - Public administration and military science 9
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380 - Commerce, communications, transportation 9
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310 - Collections of general statistics 8
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090 - Manuscripts, rare books 7
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940 - History of Europe 7
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960 - History of Africa 7
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650 - Management and auxiliary services 6
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110 - Metaphysics 5
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700 - The arts 5
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120 - Epistemology, causation, humankind 4
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640 - Home and family management 4
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900 - History & geography 4
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060 - General organizations and museology 3
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190 - Modern western philosophy 3
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320 - Political science (Politics and government) 3
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340 - Law 3
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390 - Customs, etiquette, folklore 3
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720 - Architecture 3
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740 - Graphic arts and decorative arts 3
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750 - Painting and paintings 3
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980 - History of South America 3
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990 - History of other areas 3
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050 - General serial publications 2
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070 - Documentary, educational, news media; journalism 2
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170 - Ethics (Moral philosophy) 2
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400 - Language 2
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780 - Music 2
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800 - Literature (Belles-lettres) and rhetoric 2
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820 - English & Old English literatures 2
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830 - Literatures of Germanic languages 2
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930 - History of ancient world to ca. 499 2
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040 - [Unassigned] 1
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100 - Philosophy & psychology 1
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140 - Specific philosophical schools 1
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180 - Ancient, medieval, eastern philosophy 1
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200 - Religion 1
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210 - Philosophy and theory of religion 1
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270 - History, geographic treatment, biography 1
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290 - Other religions 1
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430 - German and related languages 1
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490 - Other languages 1
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670 - Manufacturing 1
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680 - Manufacture of products for specific uses 1
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690 - Construction of buildings 1
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730 - Sculpture and related arts 1
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770 - Photography, computer art, cinematography 1
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810 - American literature in English 1
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840 - Literatures of Romance languages 1
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950 - History of Asia 1
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