Proceedings of the Senate of Pennsylvania in commemoration of Hon. Thomas B. Harper,

Mode of access: Internet.

Memorial proceedings of the Senate upon the death of Hon. Algernon B. Roberts, late a senator from the twelfth district of Pennsylvania.

Mode of access: Internet.

The Pennsylvania legislator; III, VI-VII political essays written for members of the general assembly,

Mode of access: Internet.

Pennsylvania, the story of a commonwealth,

Map on lining-papers.

Petroglyphs in the Susquehanna River near Safe Harbor, Pennsylvania ...

Notes and bibliography: p. 52-59.

Railroad accident report : Southern Pacific Transportation Co. freight train 2nd BSM 22 munitions explosion, Benson, Arizona, May 24, 1973 /

Mode of access: Internet.

Railroad accident report : Long Island Rail Road Company door accident, Huntington Station, New York, December 1, 1974 /

"SS-R-35"

Mathematics in management; proceedings of a short course conducted by [Dept. of Engineering Mechanics and General Extension Services, the Pennsylvania State University, with cooperation from General Electric Co. and others] June 13-17, 1955.

Includes bibliographies.

Collision of Union Pacific Railroad train MHOTU-23 with BNSF Railway Company train MEAP-TUL-126-D with subsequent derailment and hazardous materials release, Macdona, Texas, June 28, 2004.

"PB2006-916303," "Notation 7675D."

A half century of bird life in Berks County, Pennsylvania,

Mode of access: Internet.

The bird life of Berks County, Pennsylvania /

Mode of access: Internet.

Birds of the Pocono Mountains, Pennsylvania /

Bibliography: p. 73-76.

Birds of central Pennsylvania /

Caption title.

Birds of the State College Region, Pennsylvania /

Cover title.

Pennsylvania birdlife.

Mode of access: Internet.