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636 - Animal husbandry 6,334 635 - Garden crops (Horticulture) 4,364 630 - Agriculture and related technologies 3,456 631 - Techniques, equipment & materials 2,771 634 - Orchards, fruits, forestry 2,288 639 - Hunting, fishing & conservation 1,622 632 - Plant injuries, diseases, pests 1,347 633 - Field and plantation crops 1,321 637 - Processing dairy and related products 237 638 - Insect culture 203 338 - Production 52 333 - Economics of land and energy 46 597 - Cold-blooded vertebrates 38 016 - Of works on specific subjects 26 551 - Geology, hydrology, meteorology 16 598 - Aves 16 582 - Plants noted for characteristics & flowers 12 628 - Sanitary engineering 11 574 - [Unassigned] 10 330 - Economics 9 581 - Specific topics in natural history of plants 9 712 - Landscape architecture (Landscape design) 9 595 - Arthropoda 8 619 - [Unassigned] 8 577 - Ecology 5 591 - Specific topics in natural history of animals 5 599 - Mammalia 5 664 - Food technology 5 082 - General collections in English 4 301 - Sociology and anthropology 4 346 - Private law 4 363 - Other social problems and services 4 589 - [Unassigned] 4 614 - Forensic medicine; incidence of disease 4 641 - Food and drink 4 096 - Books notable for illustrations and materials 3 309 - [Unassigned] 3 343 - Military, tax, trade & industrial law 3 382 - International commerce (Foreign trade) 3 576 - Genetics and evolution 3 583 - Eudicots and Ceratophyllales 3 585 - Pinophyta 3 779 - Photographic images 3 060 - General organizations and museology 2 306 - Culture and institutions 2 328 - The legislative process 2 362 - Social problems and services to groups 2 388 - Transportation 2 557 - Earth sciences of North America 2 594 - Mollusca and Molluscoidea 2 611 - Human anatomy, cytology, histology 2 615 - Pharmacology and therapeutics 2 616 - Diseases 2 621 - Applied physics 2 622 - Mining and related operations 2 623 - Military and nautical engineering 2 627 - Hydraulic engineering 2 640 - Home and family management 2 663 - Beverage technology 2 674 - Lumber processing, wood products, cork 2 745 - Decorative arts 2 770 - Photography, computer art, cinematography 2 930 - History of ancient world to ca. 499 2 966 - West Africa and offshore islands 2 971 - Canada 2 001 - Knowledge 1 005 - Computer programming, programs, data, security 1 081 - General collections in American English 1 090 - Manuscripts, rare books 1 300 - Social sciences 1 305 - Groups of people 1 320 - Political science (Politics and government) 1 331 - Labor economics 1 334 - Cooperatives 1 344 - Labor, social, education & cultural law 1 347 - Procedure and courts 1 361 - Social problems and services 1 364 - Criminology 1 370 - Education 1 371 - Schools and their activities; special education 1 374 - Adult education 1 375 - Curricula 1 381 - Commerce (Trade) 1 394 - General customs 1 500 - Natural sciences and mathematics 1 508 - Natural history 1 530 - Physics 1 539 - Modern physics 1 546 - Inorganic chemistry 1 558 - Earth sciences of South America 1 559 - Earth sciences of other areas 1 571 - Physiology & related subjects 1 579 - Microorganisms, fungi & algae 1 584 - Monocots, Chloranthales, magnoliids 1 610 - Medicine and health 1 620 - Engineering and allied operations 1 629 - Other branches of engineering 1 643 - Housing and household equipment 1 658 - General management 1 666 - Ceramic & allied technologies 1