Unite, B. K. 1st earthquake-resistant bridge starts construction in Surigao. Manila Bulletin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUnite, Betheena Kae. "1st Earthquake-resistant Bridge Starts Construction in Surigao." Manila Bulletin .
एमएलए (9वां संस्करण) प्रशस्ति पत्रUnite, Betheena Kae. "1st Earthquake-resistant Bridge Starts Construction in Surigao." Manila Bulletin, .
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