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Precise Leveling in Texas

U.S. Coast and Geodetic SurveyHenry Godfrey Avers

出版	U.S. Government Printing Office, 1929
URL	http://books.google.com.hk/books?id=05GgfuLu3AQC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN