Não informado. (2001). Annual report of the Bureau of Science, Philippine Islands. Bureau of Science.
Citace podle Chicago (17th ed.)Não informado. Annual Report of the Bureau of Science, Philippine Islands. Manila: Bureau of Science, 2001.
Citace podle MLA (8th ed.)Não informado. Annual Report of the Bureau of Science, Philippine Islands. Bureau of Science, 2001.
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