Other
Brøderbund
5
Learning Company
4
Tepper, Michael
3
Balch Institute Center for Immigration Research
2
Baca, Leonard
1
Colletta, John Philip, 1949-
1
Filby, P. William, 1911-
1
Gale Research Inc
1
Hall, Charles M.
1
Olsson, Nils William, 1909-
1
Pennsylvania German Folklore Society
1
Pennsylvania German Folklore Society Yearbook
1
Swierenga, Robert P.
1
Yoder, Don
1