Author
Jackson, Ronald Vern
222
Sanborn Map Company
153
United States Census Office
141
United States. Bureau of the Census
116
Teeples, Gary Ronald,
111
Potter, Dorothy Williams
79
Pennsylvania Historical and Museum Commission
68
United States. Federal Highway Administration
50
United States. National Park Service
50
Delaware. Division of Highways. Location and Environmental Studies Office
47
Genealogical Society of Utah
47
Rand McNally and Company
45
Frederic R. Kirkland Collection
43
Historical Society of Pennsylvania
42
United States Census Office 7th census, 1850
42
Delaware. Bureau of Archaeology and Historic Preservation
40
Philadelphia City Planning Commission
36
Karl Baedeker (Firm)
33
Mitchell, S. Augustus 1792-1868
33
Ruff, Paul Miller, 1918-
32
Elliott, Bruce S.
30
Pennsylvania Railroad
29
Teeples, Gary Ronald
29
Ontario Genealogical Society
28
Pennsylvania. Bureau of Topographic and Geologic Survey
28
Washington, George, 1732-1799
28
Carey, Mathew, 1760-1839
27
Maier, Phyllis C.
27
Pennsylvania
27
Philadelphia Record
27
ADC (Firm)
26
Archives of Czechs and Slovaks Abroad
26
Daughters of the American Revolution
25
Schaefermeyer, David,
25
United States Census Office 5th census, 1830
25
Custer, Jay F., 1955-
24
Institute of Early American History and Culture (Williamsburg, Va.)
24
Pennell, Joseph, 1857-1926
24
Page, William, 1861-1934
23
Smith, J. L.
23
United States Census Office 4th census, 1820
23
Maryland State Archives
22
Melish, John, 1771-1822
22
Manton, John C., 1948-
21
National Genealogical Society
21
Pre-1801 Imprint Collection (Library of Congress)
21
Library of Congress
20
Tanner, Henry Schenck, 1786-1858
20
United States. Work Projects Administration. Division of Professional and Service Projects
20
Moore, Clarence B. 1852-1936
19
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