Factors determining the performance of indexing systems / by Cyril C leverdon and Michael Keen. - Cleverdon, Cyril W.; Keen, Michael; Aslib. Cranfield Research Project (Bedford : Cyril cleverdon, 1966)
v. 1. Design / by Cyril Cleverdon, Jack Mills and Michael Keen - pt. 1. Text -- v. 2. Test results / by Cyril Cleverdon and Michael Keen .
Includes bibliographical references.
Keywords: Indexing; Information storage and retrieval systems