@INPROCEEDINGS {MAHAPATRA:1976b, title = {Progress and problems in attempting changes in rice varieties and rice technology at the farm level in two countries of West Africa: paper presented at the WARDA Varietal Improvement Seminar, Bouake, Ivory Coast, September 13-17, 1976}, author = {Mahapatra, I. C. and Perez, A. T. and Buddenhagen, I. W. }, booktitle = {IITA Cereal Improvement Program papers: 1972-76}, year = {1976}, month = {September}, pages = {1--19}, }