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Terrestrial Magnetism

U.S. Coast and Geodetic SurveyWilliam Norris McFarlandRobert W. Knox

其他書名	Magnetic Declination in Texas in 1927
出版	U.S. Government Printing Office, 1928
URL	http://books.google.com.hk/books?id=c9g4AAAAMAAJ&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN