Não informado. (1981). Ground Water Monitoring Review. Water Well Journal Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Ground Water Monitoring Review. Worthington, Ohio: Water Well Journal Publishing, 1981.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Ground Water Monitoring Review. Water Well Journal Publishing, 1981.
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