1979. 2018-06-14T19:29:55Z. 2018-06-14T19:29:55Z. Hildreth, C. T. University of the State of New York. English. cartographic image. Public. Northeastern States, Canada, Eastern, New England, Middle Atlantic States, Canada, Eastern., Middle Atlantic States., New England., Northeastern States., États-Unis, Nouvelle Angleterre, Etats du Moyen-Atlantique, Etats-Unis, and Canada.
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2. Bouguer gravity map of the northeastern United States and adjacent Canada [cartographic material]
1980. 2002-06-01T04:00:00Z. 2023-01-05T04:01:20Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. Canada and Northeastern States.
1992. 2012-08-01T15:08:50Z. 2015-07-07T19:07:01Z. Geological Survey of Canada. Geophysical Data Centre. The Survey. English&French. Public. Canada.
1992. 2012-08-01T15:02:44Z. 2015-07-07T19:05:36Z. Geological Survey of Canada. Geophysical Data Centre. The Survey. English&French. Public. Canada.