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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPhilippines. Mapping and Resource Information Authority. Province of Biliran. Ed. 1, November, 1994. Makati, Metro Manila: National Mapping and Resource Information Authority, 1994.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPhilippines. Mapping and Resource Information Authority. Province of Biliran. Ed. 1, November, 1994. National Mapping and Resource Information Authority, 1994.
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