Philippine Council for Agriculture and Resources Research. (1977). The Philippines recommends for soil conservation 1977. PCARR.
Citace podle Chicago (17th ed.)Philippine Council for Agriculture and Resources Research. The Philippines Recommends for Soil Conservation 1977. Los Banos, Laguna: PCARR, 1977.
Citace podle MLA (9th ed.)Philippine Council for Agriculture and Resources Research. The Philippines Recommends for Soil Conservation 1977. PCARR, 1977.
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