@PROCEEDINGS {VIRMANI:1978d, title = {A Retrospect and Prospect of Rice Varietal Improvement Research in Relation to Increasing Rice Production in Liberia,}, author = {Virmani, S. S. *}, booktitle = {Paper presented at Seminar on Agricultural Self-sufficiency and the Scientific and Technological Experience, May 5, 1978. Mimeo}, year = {1978}, month = {May}, organization = {University of Liberia}, address = {Liberia}, }