Não informado. (1959). Environmental health. Central Public Health Engineering Research Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Environmental Health. Nagpur, India: Central Public Health Engineering Research Institute, 1959.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Environmental Health. Central Public Health Engineering Research Institute, 1959.
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