A cross-sectional study of the diffuion of new rice varities in Central Luzon [microform] - Mangahas, Mahar Kelly 1944- (Quezon City Photoduplication Service,University of the Philippines, 1976)
Microfilmed with 23 other titles.
Originally published in [Quezon City : Institute of Economic Development and Research, School of Economics, University of the Philippines, 1969].
Keywords: Rice -- Philippines; agricultural extension work -- Philippines