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Triangulation in Utah (1927 Datum)

U.S. Coast and Geodetic SurveyHenry Godfrey Avers

出版	U.S. Government Printing Office, 1937
URL	http://books.google.com.hk/books?id=mG8iAQAAIAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN