Davis, R. E., & Kelly, J. W. (1942). Short course in surveying. New York: McGraw-Hill.
Παραπομπή Chicago StyleDavis, Raymond E., and Joe Wallace Kelly. Short Course in Surveying. New York: McGraw-Hill, 1942.
Παραπομπή MLADavis, Raymond E., and Joe Wallace Kelly. Short Course in Surveying. New York: McGraw-Hill, 1942.
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