Автор
Geological Survey (U.S.)
896
Maryland Geological Survey
366
Maryland
304
United States Bureau of the Census
227
Maryland Historical Society
153
Maryland General Assembly
139
Harris Collection of American Poetry and Plays (Brown University) Broadsides
127
United States Congress
123
Rand McNally and Company
119
United States
114
Federal Financial Institutions Examination Council (U.S.)
99
American Automobile Association
97
Maryland Agricultural Experiment Station
92
ADC (Firm)
89
Douglass, Frederick, 1818-1895
86
Baltimore Museum of Art
84
Simon, David, 1960-
84
Tyler, Anne
70
United States Soil Conservation Service
70
United States Bureau of Labor Statistics
69
Adam Matthew Digital (Firm)
68
Sharp, John, 1754-1840
64
United States National Park Service
64
Maryland Court of Appeals
63
Maryland General Assembly. House of Delegates
63
Walters Art Gallery (Baltimore, Md.)
62
Maryland Department of Geology, Mines, and Water Resources
59
National Archives (Great Britain)
58
Baltimore (Md.)
56
General Drafting Company
55
Morgan State University Community Development Resource Center
55
Regional Planning Council (Md.)
54
Gotham Book Mart Collection (University of Pennsylvania)
52
United States Army. Corps of Engineers
51
Home Box Office (Firm)
50
Reiche, J. F.
50
Ellicott, Andrew, 1754-1820
48
Maryland State Highway Administration
48
Johnson, Clark, 1954-
46
United States Coast Survey
46
Lippman, Laura, 1959-
45
University of North Carolina at Chapel Hill Documenting the American South (Project)
45
University of North Carolina at Chapel Hill Library
45
West, Dominic, 1969-
45
Baltimore and Ohio Railroad Company
43
H.M. Gousha Company
43
HBO Video (Firm)
43
Maryland Constitutional Convention
43
Doman, John, 1945-
42
Great Britain Colonial Office
41
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