1. Automatic Information Organisation and Retrieval;Salton,1968
2. The SMART Retrieval System—Experiments in Automatic Document Processing,1971
3. Automatic Keyword Classification for Information Retrieval;Sparck-Jones,1971
4. Computer Handling of Chemical Structure Information;Lynch,1971
5. The use of hierarchic clustering in information retrieval;Jardine;Inform. Stor. Retr.,1971