A technique for the evaluation of a commercial information service and some preliminary results from the drugdoc service of the excerpta medica foundation
- 30 November 1971
- journal article
- Published by Elsevier in Information Storage and Retrieval
- Vol. 7 (4) , 149-165
- https://doi.org/10.1016/0020-0271(71)90001-5
Abstract
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