Author
Bryson, Kristin K.
2
Koelble, Susan S.
2
Moak, Jefferson M.
2
Pennsylvania Historical Commission
2
United States. Bureau of the Census
2
United States. Work Projects Administration
2
Bentley, Elizabeth Petty
1
Br¿derbund
1
Brøderbund
1
Filby, P. William 1911-2002
1
Genealogical Society of Pennsylvania
1
Gunning, Kathryn McPherson
1
Jackson, Ronald Vern
1
Learning Company
1
Learning Company (Firm)
1
Pickron, Nesheena
1
Stock, Walter D.
1
Tepper, Michael
1
United States Census Office
1
United States Census Office 7th census, 1850
1