Author
United States. Bureau of the Census
12
Brøderbund
5
Learning Company
4
Balch Institute Center for Immigration Research
2
Br¿derbund
1
Bunnell, Paul J. 1946-
1
Filby, P. William, 1911-
1
Gale Research Inc
1
Genealogical Services (Danville, Va.)
1
Historical Society of Pennsylvania
1
Jackson, Ronald Vern
1
Laverty, Bruce, 1958-
1
Learning Company (Firm)
1
Moodey, John S. 1842-
1
Robertson, James I.
1
United States Bureau of Census
1
United States. Census Office
1
United States. Congress. House
1
United States. Record and Pension Office
1
United States. War Department
1
United States. War Records Office
1