Philippine Council For Agriculture, Forestry and Natural Resources Research And Development, & National Science and Technology Authority. (1986). State of the art non-metallic minerals: Fertilizer research. Philippine Council for Agriculture and Resources Research and Development.
Παραπομπή σε μορφή Chicago (17η εκδ.)Philippine Council For Agriculture, Forestry and Natural Resources Research And Development, και National Science and Technology Authority. State of the Art Non-metallic Minerals: Fertilizer Research. Los Banos, Laguna: Philippine Council for Agriculture and Resources Research and Development, 1986.
Παραπομπή σε μορφή MLA (9th εκδ.)Philippine Council For Agriculture, Forestry and Natural Resources Research And Development, και National Science and Technology Authority. State of the Art Non-metallic Minerals: Fertilizer Research. Philippine Council for Agriculture and Resources Research and Development, 1986.