Obias, R. O. (1975). Timing of nitrogen application on lowland rice vareities differing in growth duration [microform]. Photoduplication Services,University of the Philippines Library.
Chicago Style (17th ed.) CitationObias, Raymundo O. Timing of Nitrogen Application on Lowland Rice Vareities Differing in Growth Duration [microform]. Quezon City: Photoduplication Services,University of the Philippines Library, 1975.
MLA (9th ed.) CitationObias, Raymundo O. Timing of Nitrogen Application on Lowland Rice Vareities Differing in Growth Duration [microform]. Photoduplication Services,University of the Philippines Library, 1975.
Warning: These citations may not always be 100% accurate.