Clendinning, J., & Olliver, J. G. (1979). Principles and use of Surveying Instruments (3rd ed.). ELBS and Van Nostrand.
शिकागो स्टाइल उद्धरणClendinning, J., और J. G. Olliver. Principles and Use of Surveying Instruments. 3rd ed. London: ELBS and Van Nostrand, 1979.
एमएलए उद्धरणClendinning, J., और J. G. Olliver. Principles and Use of Surveying Instruments. 3rd ed. ELBS and Van Nostrand, 1979.
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