Umali, D. L. (1961). Improving human resources for agricultural progress. College of Agriculture University of the Philippines.
Citace podle Chicago (17th ed.)Umali, Dioscoro L. Improving Human Resources for Agricultural Progress. Los Banos, Laguna: College of Agriculture University of the Philippines, 1961.
Citace podle MLA (9th ed.)Umali, Dioscoro L. Improving Human Resources for Agricultural Progress. College of Agriculture University of the Philippines, 1961.
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