Pennsylvania: Mifflinburg Quadrangle. 15-minute series

Description:

United States. Geological Survey. U.S.G.S. Polyconic projection. Relief shown by 20 feet contour interval and spot heights. Surveyed in 1938. Verso: The topographic maps of the United States.

Publisher:

[Washington, D.C.] : U.S. Geological Survey,

Subject(s):

Topographic maps

Held by:

Princeton

More details at:

https://catalog.princeton.edu/catalog/6868043