1862. 2008-08-08T15:24:47Z. 2018-09-05T19:53:09Z. Walling, Henry Francis, 1825-1888, creator, surveyor. Smith, Palmer & Co. English. cartographic image. Public. Pennsylvania and Pennsylvania.
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1852. 2002-06-01T04:00:00Z. 2018-09-28T03:01:25Z. Horace Thayer & Co., cartographer, publisher. Horace Thayer & Co., 50 Ann St. English. cartographic image. Public. Pennsylvania and Pennsylvania.
43. Williamsport
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.
44. Williamsport quadrangle, Maryland-West Virginia-Pennsylvania, 1944 : 15 minute series (topographic)
1965. 2012-07-25T19:47:07Z. 2022-07-11T15:14:30Z. Geological Survey (U.S.). The Survey. English. Public. Maryland., West Virginia., 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.