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- [36] CROP SCIENCE RESEARCH IN SUB-SAHARAN AFRICA - A BIBLIOMETRIC OVERVIEW AGRICULTURAL ADMINISTRATION AND EXTENSION, 1987, 25 (02): : 99 - 123
- [38] SCIENCE, EDUCATION AND DEVELOPMENT IN SUB-SAHARAN AFRICA - ZYMELMAN,M CANADIAN JOURNAL OF AFRICAN STUDIES-REVUE CANADIENNE DES ETUDES AFRICAINES, 1992, 26 (03): : 563 - 565