A Comparison of Three Online Information Retrieval Services / Harriet W. Zais.

Three firms which offer online information retrieval are compared. The firms are Lockheed Information Service, System Development Corporation and the Western Research Application Center. Comparison tables provide information such as hours accessible, coverage, file update, search elements and cost f...

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Bibliographic Details
Main Author:	Zais, Harriet W.
Corporate Author:	Lawrence Berkeley Laboratory
Language:	English
Published:	[Place of publication not identified] : Distributed by ERIC Clearinghouse, 1974.
Subjects:	Comparative Analysis. Costs. Databases. Guides. Information Retrieval. Information Systems. Online Systems. Services. ERIC > Lockheed > System Development Corporation > Western Research Application Center Reports, Research.
Genre:	Reports, Research.
Physical Description:	32 pages
Format:	Microfilm Book

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