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First and Second Order Triangulation in Oregon 1927 Datum

U.S. Coast and Geodetic SurveyClarence Herbert Swick

出版	U.S. Government Printing Office, 1932
URL	http://books.google.com.hk/books?id=2d2c5NhHXO8C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN