Coller, R. W. (1960). Barrio Gacao: A study of village ecology and the Schistosomiasis problem. Community Development Research Council, University of the Philippines.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रColler, Richard W. Barrio Gacao: A Study of Village Ecology and the Schistosomiasis Problem. [Quezon City]: Community Development Research Council, University of the Philippines, 1960.
एमएलए (9वां संस्करण) प्रशस्ति पत्रColler, Richard W. Barrio Gacao: A Study of Village Ecology and the Schistosomiasis Problem. Community Development Research Council, University of the Philippines, 1960.
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