Author
Weiss, Harry B. 1883-1972
5
Imlay, Gilbert, 1754?-1828?
4
Agricultural History Society
3
Edwards, Everett Eugene, 1900-
3
Filson, John, approximately 1747-1788
3
Fletcher, S. W. 1875-
3
Philadelphia Society for Promoting Agriculture
3
Weiss, Grace M.
3
Andreasen, H.
2
Archives of Czechs and Slovaks Abroad
2
Bell, Herbert C. 1868-
2
Board of Aid to Land Ownership
2
Bowers, Douglas
2
Carr, Lois Green
2
Cat Spring Agricultural Society
2
Conference on Maryland History, Annapolis,
2
De Rosa, Luigi, 1922-2004
2
Delaware. Department of Transportation
2
Delaware. Department of Transportation. Division of Planning. Location and Environmental Studies Office
2
Delaware. State Historic Preservation Office
2
Du Barry, Edmund L.
2
Dubrovsky, Gertrude Wishnick, 1926-
2
Frear, William, 1860-1922
2
Glazier, Ira A.
2
Howe, Henry, 1816-1893
2
Hughes, Thomas, 1822-1896
2
International Economic History Congress
2
Jefferson, Thomas, 1743-1826
2
John, J. J., 1829-
2
Kilburn, Francis
2
Land, Aubrey C.
2
Lawes, Jane Goodson
2
Lehigh County Agricultural Society, Allentown, Pa
2
Lemon, James Thomas, 1929-
2
Lukes, Timothy J., 1950-
2
New Jersey Agricultural Society Committee on Agricultural Society History
2
Okihiro, Gary Y., 1945-
2
Papenfuse, Edward C.
2
Pennsylvania State University Agricultural Experiment Station
2
Poussin, Guillaume Tell, 1794-1876
2
Radoff, Morris L., 1905-1978
2
Smith, Andrew F., 1946-
2
Smithsonian Institution
2
Tennessee. Bureau of Agriculture, Statistics, and Mines
2
United States. Federal Highway Administration
2
United States. Work Projects Administration. Division of Community Service Programs
2
University of California, Davis. Agricultural History Center
2
Van Deburg, William L.
2
Washington, George, 1732-1799
2
Weiss, Grace M.,
2
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