1. Canonical Structure in Attribute Based File Organization;Wong,1971
2. Statistical Discrimination of the Synonym-Autonym Relationship between Words;Lewis,1967
3. The use of second order descriptors for document retrieval;Libbey;Am. Docum.,1967
4. Many-Valued Logic;Rescher,1969
5. Automatic Information Organization and Retrieval;Salton,1962