The undergarment industry in Pennsylvania /

Caption title.

Amendments to the Pennsylvania Avenue plan.

"November 1990."

Annual Report on the Geological Survey of Pennsylvania

Title Varies: 1st: Annual Report of the State Geologist; 2d, 5th: Annual Report on the Geological Exploration; 3d-4th, 6th: Annual Report on the Geological Survey

Nuclear fission and atomic energy/

"Originated in a series of seminars ... held in the Physics Department of the University of Pennsylvania in the fall of 1945."

Historical sketches : a collection of papers prepared for the Historical Society of Montgomery County, Pennsylvania.

Mode of access: Internet.

Managing the tenant-operated farm

Mode of access: Internet.

The shoe industry in Pennsylvania /

Includes bibliographical references (p. 37).