1. Articulation in the generation of subject indexes by computer;Armitage;Journal of Chemical Documentation,1967
2. Some structural characteristics of articulated subject indexes;Armitage;Information Storage and Retrieval,1968
3. Conversational investigations of student learning—ethods and psychological tools for learning-to-learn;Augstein;Core,1979
4. PRECIS: a manual of concept analysis and subject indexing;Austin,1974
5. Internal knowledge and external information;Belkin,1977