1
Author: Folsom, Burton W.
Published 1981
Record Source: Published Materials
...Lackawanna River Valley (Pa.) Economic conditions....
Book
2
Author: Barker, George F. 1835-1910.
Published 1880
Record Source: Published Materials
...Schuylkill River (Pa.) Case studies....
Book
3
Author: Jenne, Lyle L.
Published 1930
Record Source: Published Materials
...Schuylkill River Case studies....
Book