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Dutta, S and Sinha, P K (1984) Pragmatic approach to subject indexing: A new concept. Journal of the American Society for Information Science, 35 (6). pp. 325-331. ISSN 2330-1643
Haravu, L J and Sinha, P K and Prasannalakshmi, S and Jotwani, D and Naidu, R G (1990) AGRIS Level II and the Information Services of Specialized Information Analysis Centers: The Case of Satcris and its SDI Services. Quarterly Bulletin of IAALD, 35 (1). pp. 11-18. ISSN 0020-5966