1949. 2012-07-30T17:43:23Z. 2012-07-30T17:43:23Z. Geological Survey of Canada. The Survey. English. Public. Alberta, Callum Creek Region, and Oldman River Region.
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1949. 2012-03-21T18:59:50Z. 2015-10-21T15:21:42Z. U.S. Coast and Geodetic Survey. The Survey. English. Public. Cleveland (Ohio).
1949. 2018-05-15T19:48:15Z. 2018-05-15T19:48:15Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. Colorado, Rocky Mountains Region, Colorado., and Rocky Mountains Region.
1949. 2018-07-30T18:08:00Z. 2018-07-30T18:08:00Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. Georgia and Georgia.
1949. 2018-07-30T18:12:29Z. 2018-07-30T18:12:29Z. Geological Survey (U.S.). The Survey. English. cartographic image. Public. Washington (State).
1949. 2012-07-11T14:42:20Z. 2021-09-28T15:55:00Z. Geological Survey (U.S.). The Survey. English. Public. Maryland and West Virginia.
1949. 2012-07-30T17:37:31Z. 2012-07-30T17:37:31Z. Geological Survey of Canada. The Survey. English. Public. Alberta and Langford Creek Region.
1949. 2013-05-14T13:48:41Z. 2015-10-27T22:11:32Z. United States. Bureau of Public Roads. The Survey. English. Public. Utah.
