Nuyda, D. G. (1999). A National policy for sustainable mining. IN Seeing green [column]. Philippine Daily Inquirer.
Chicago-viite (17. p.)Nuyda, Doris G. "A National Policy for Sustainable Mining. IN Seeing Green [column]." Philippine Daily Inquirer 1999.
MLA-viite (9. p.)Nuyda, Doris G. "A National Policy for Sustainable Mining. IN Seeing Green [column]." Philippine Daily Inquirer, 1999.
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