1965. 2017-12-15T14:48:31Z. 2017-12-15T14:48:31Z. United States. Army Map Service. Geological Survey. English. cartographic image. Public. Pennsylvania and Pennsylvania.
1966. 2017-12-15T14:40:58Z. 2017-12-15T14:42:18Z. United States. Army Map Service. Geological Survey. English. cartographic image. Public. Wilmington (Del.), Pennsylvania, New Jersey, Maryland, Delaware, Wilmington., Maryland., New Jersey., and Pennsylvania.
1963. 2017-12-13T19:21:19Z. 2017-12-13T19:21:19Z. Canada. Department of Mines and Technical Surveys. Geological Survey. English. cartographic image. Public. Maine, New Brunswick, Maine., and New Brunswick.
1926. 2018-06-26T20:04:55Z. 2021-09-22T16:54:42Z. Hanson, George, 1891-. Geological Survey. English. cartographic image. Public. British Columbia, Zymoetz River Region (B.C.), and British Columbia.