Alcantara, N. (1997). Dam silt piling up, but execs helpless. Philippine Daily Inquirer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAlcantara, Nathan. "Dam Silt Piling Up, but Execs Helpless." Philippine Daily Inquirer 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAlcantara, Nathan. "Dam Silt Piling Up, but Execs Helpless." Philippine Daily Inquirer, 1997.
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