Author
A citizen of Philadelphia, pseud
1
A.H. Mueller & Co
6
ADC (Firm)
10
Abbott, Charles C. 1843-1919
4
Abel, Mary Bilderback
1
Accelerated Indexing Systems International
1
Ackerman, Karen M.
1
Acrelius, Israel, 1714-1800
2
Adams Apple Press
1
Adams, Charles J.
1
Adams, Charles J. III
1
Adams, Richard C.
1
Adams, Richard C. 1864-1921
5
Adkins, George
1
Adkins, George S.
1
Agnew, Daniel, 1809-1902
2
Agricultural Convention of the State of Delaware
1
Agricultural Society and Institute of New Castle County, Del
1
Agricultural Society of Kent County (Del.)
1
Agricultural Society of New Castle County (Del.)
1
Albertype Co
5
Alexandria Drafting Company
1
Allen, Clifford P. 1841-
3
Alliance for Watershed Education of the Delaware River
1
Alrich Family Reunion
1
Alrich, Bill
1
Ambrose, George W.
1
American Alliance of Museums
1
American Association of Teachers of Spanish and Portuguese. Southeastern Penna. Chapter. Bicentennial Committee
1
American Catholic Historical Society of Philadelphia
1
American Flag Manufacturing Company
1
American Historical Association
1
American Imprint Collection (Library of Congress)
8
American Lutheran Church Historical Society
1
American Medical Association
1
American Philosophical Society. Historical & Literary Committee
1
American Society of Civil Engineers. Philadelphia Section
2
American Sunday-School Union
1
American Swedish Historical Museum (Philadelphia, Pa.)
2
American Turners (Organization)
1
American Turners (Organization) Wilmington
2
American-Finnish Society of the Delaware Valley
1
An engineer
1
Anastasia, George
1
Andariese, Walter S.
1
Anderson, Alexander, 1794-1869
1
Anderson, Enoch, 1753 or 1754-1824
1
Anderson, J. A., of Lambertville, N. J.
1
Anderson, John Alexander, 1829-1917
2
Antelope Valley Genealogical Society (Lancaster, CA)
1
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