Schofield, W. (1993). Engineering surveying: Theory and examination problems for students (4th ed.). Butterworth-Heinemann.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSchofield, W. Engineering Surveying: Theory and Examination Problems for Students. 4th ed. Oxford [England]: Butterworth-Heinemann, 1993.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSchofield, W. Engineering Surveying: Theory and Examination Problems for Students. 4th ed. Butterworth-Heinemann, 1993.
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