University of the Philippines (Diliman). National Institute of Geological Sciences. (1985). National Institute of Geological Sciences: Documents and other information. NIGS, College of Science, U.P.
Citace podle Chicago (17th ed.)University of the Philippines (Diliman). National Institute of Geological Sciences. National Institute of Geological Sciences: Documents and Other Information. Quezon City: NIGS, College of Science, U.P, 1985.
Citace podle MLA (9th ed.)University of the Philippines (Diliman). National Institute of Geological Sciences. National Institute of Geological Sciences: Documents and Other Information. NIGS, College of Science, U.P, 1985.
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