Não informado. (1938). Philippine Journal of Forestry. Department of Agriculture and Natural Resources.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Philippine Journal of Forestry. Manila: Department of Agriculture and Natural Resources, 1938.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Philippine Journal of Forestry. Department of Agriculture and Natural Resources, 1938.
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