Espada, W. G. (1977). The influence of silica and nitrogen fertilization on growth and yield of peta and chianung 242 lowland rice varieties [microform]. University of the Philippines Library.
Chicago Style (17th ed.) CitationEspada, Wilfredo G. The Influence of Silica and Nitrogen Fertilization on Growth and Yield of Peta and Chianung 242 Lowland Rice Varieties [microform]. Quezon City: University of the Philippines Library, 1977.
MLA (9th ed.) CitationEspada, Wilfredo G. The Influence of Silica and Nitrogen Fertilization on Growth and Yield of Peta and Chianung 242 Lowland Rice Varieties [microform]. University of the Philippines Library, 1977.
Warning: These citations may not always be 100% accurate.