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Bouguer Gravity Anomaly Map and Geologic Interpretation of the Iron River 1 Degree by 2 Degrees Quadrangle, Michigan and Wisconsin (1:250,000).

Geological Survey (U.S.)

出版	1981
URL	http://books.google.com.hk/books?id=ZSmPPgAACAAJ&hl=&source=gbs_api