Ponce, D. M. (1978). The supervised farming program of Central Luzon State University Barrio Development Schools. s.n.
Citace podle Chicago (17th ed.)Ponce, Deogracias M. The Supervised Farming Program of Central Luzon State University Barrio Development Schools. s.l: s.n, 1978.
Citace podle MLA (9th ed.)Ponce, Deogracias M. The Supervised Farming Program of Central Luzon State University Barrio Development Schools. s.n, 1978.
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