Não informado. (1938). Philippine Journal of Forestry. Department of Agriculture and Natural Resources.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Philippine Journal of Forestry. Manila: Department of Agriculture and Natural Resources, 1938.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Philippine Journal of Forestry. Department of Agriculture and Natural Resources, 1938.
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