Chacko, V. (1965). Manual on sampling techniques for forest surveys. The Manager of Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रChacko, V.J. Manual on Sampling Techniques for Forest Surveys. Delhi: The Manager of Publications, 1965.
एमएलए (9वां संस्करण) प्रशस्ति पत्रChacko, V.J. Manual on Sampling Techniques for Forest Surveys. The Manager of Publications, 1965.
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