Author
Pennsylvania Historical Commission
Frontier Forts and Trails Survey
5
Pennsylvania. Department of Public Instruction
4
Stevens, Sylvester Kirby, 1904-
4
Pennsylvania Historical Survey
2
Bouquet, Henry, 1719-1765
1
British Museum
1
Frontier Forts and Trails Company
1
Heckman, Oliver S.
1
Kent, Donald H.,
1
Pennsylvania 300th Anniversary Commission
1
Pennsylvania Social Studies Council
1
State Council of Defense (Pa.)
1
Stevens, Sylvester Kirby, 1904-1974
1
United States Works Projects Administration
1
United States. Federal Works Agency
1
Writers' Program of the Work Projects Administration in the Commonwealth of Pennsylvania
1