National Academy of Science and Technology (Philippines). Transactions of the National Academy of Science and Technology, Republic of the Philippines 1991, volume XIII. NAST.
Citace podle Chicago (17th ed.)National Academy of Science and Technology (Philippines). Transactions of the National Academy of Science and Technology, Republic of the Philippines 1991, Volume XIII. Taguig, Metro Manila: NAST.
Citace podle MLA (9th ed.)National Academy of Science and Technology (Philippines). Transactions of the National Academy of Science and Technology, Republic of the Philippines 1991, Volume XIII. NAST.
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