@INPROCEEDINGS {SHARMA:1978a, title = {Collection and conservation of the existing rice species and varieties of Africa}, author = {Sharma, S. D. and Steele, W. M. }, booktitle = {Rice in Africa: proceedings of a conference held at the International Institute of Tropical Agriculture, Ibadan, Nigeria, 7-11 March, 1977}, year = {1978}, pages = {61--67}, publisher = {Academic Press}, location = {London, UK}, }