1. CAS Today,1967
2. The effectiveness of non-user relevance assessments;Barhydt;J. Docum.,1967
3. Aslib Cranfield Research Project;Cleverdon;Factors Determining the Performance of Indexing Systems,1966
4. Weighted term search: a computer program for an inverted coordinate index on magnetic tape;Mathews;J. chem. Docum.,1967
5. Search strategy and the optimization of retrieval effectiveness;Salton,1967