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Institution
Collection
Format
Subject
2
Parks
2
Washington (D.C.)
2
Washington (D.C.) History
1
Acid rain
1
African Americans
1
Canals Conservation and restoration
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1
Canals Recreational use History
1
Chesapeake and Ohio Canal (Md. and Washington, D.C.) Recreational use History
1
Chesapeake and Ohio Canal National Historical Park Planning
1
Chesapeake and Ohio Canal National Historical Park Recreational use
1
Delaware
1
Delaware Altitudes
1
Enslaved persons
1
Freed persons
1
Geological surveys
1
Geology
1
Groundwater
1
Historic parks
1
Hydrogeological surveys
1
Hydrology Research
1
Maine Altitudes
1
Maryland
1
Maryland Altitudes
1
Maryland History Campaigns
1
Middle Atlantic States
1
Mines and mineral resources
1
Monuments
1
New Hampshire Altitudes
1
New Jersey
1
Oxon Cove Park (Md. and Washington, D.C.)
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Author
4
Geological Survey (U.S.)
3
United States. National Park Service
1
Bolden, Tonya,
1
Carpenter, David H.
1
Darton, Nelson Horatio, 1865-1948
1
Elmes, Diana
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1
Exxon Mobil Corporation
1
Fenneman, Nevin Melancthon, 1865-1945
1
Fleck, William B.
1
Gillen, D. F.
1
Girty, George Herbert, 1869-1939
1
Herrmann, Thomas E.
1
James, R. W.
1
Mackintosh, Barry
1
Marshall, R. B. 1867-1949
1
McGrew, Dallas D. L.
1
Olsen, Lisa D.
1
Smith, Philip S. 1877-1949
1
Snow, Peter, 1938-
1
United States. Congress. Senate. Committee on Energy and Natural Resources
1
United States. National Park Service. History Division
1
United States. President's Committee on Employment of the Handicapped
1
Vint, Thos. C.
1
Vroblesky, Don A.
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Language
Literary Form
Region
Maryland
Washington (D.C.)
5
Delaware
4
Virginia
2
United States
1
Alaska
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1
Arizona
1
Arkansas
1
Chesapeake and Ohio Canal (Md. and Washington, D.C.)
1
Chesapeake and Ohio Canal National Historical Park
1
Illinois
1
Maine
1
Middle Atlantic States
1
Mississippi
1
Missouri
1
New Hampshire
1
New Jersey
1
New Mexico
1
Oxon Cove Park (Md. and Washington, D.C.)
1
Pennsylvania
1
Prince George's County
1
Seward Peninsula
1
Utah
1
Vermont
1
West Virginia
1
Wyoming
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Call Number
Year of Publication