Nature
- A Revised Taxonomic Account of Gymnosporangium
Kern, Frank D. - A Guide to Eastern Hawk Watching
Heintzelman, Donald S. - A Pictorial Guide to the Identification of Fusarium Species
Toussoun, T.A. and Paul E. Nelson - Allegheny Episodes: Folk Lore and Legends Collected in Northern and Western Pennsylvania
By Henry W. Shoemaker - Allegheny River, The
By Jim Schafer - American Shad in the Susquehanna River Basin
By Richard Gerstell - Battling for Manassas
By Joan M. Zenzen - Black Flies
Kim, Ke Chung and Richard W. Merritt eds. - Deer Wars
By Robert Frye - Don’t Burn it Here
By Ed Walsh, Rex Warland, and Doug Clayton Smith - Down the Susquehanna to the Chesapeake
By Jack Brubaker - Edible Wild Plants of Pennsylvania and Neighboring States
By Richard & Mary Lee Medve - Electric Traction on the Pennsylvania Railroad
By Michael Bezilla - Environmental Philosophy
Elliot, Robert and Arran Gare - Field Guide to Wild Mushrooms of Pennsylvania and the Mid-Atlantic
By Bill Russell - Fishes of Pennsylvania and the Northeastern United States
By Edwin L. Cooper - Geography of Pennsylvania, A
By E. Willard Miller - Guide to Hawk Watching in North America, A
Heintzelman, Donald S. - More Allegheny Episodes: Legends and Traditions, Old and New, Gathered Among the Pennsylvania Mountains
By Henry W. Shoemaker - Naturalistic Behavior of Nonhuman Primates
Carpenter, C. R. - New Pioneers
By Jeffery Carl Jacob - Organizational Values and Political Power
Twight, Ben W. - Pearl Millet
Rachie, Kenneth O. and J.V. Majmudar - Pennsylvania Deer and Their Horns
By Henry W. Shoemaker - Pennsylvania Lion or Panther & Felis Catus in Pennsylvania?
By Henry W. Shoemaker - Rivers of Pennsylvania
Palmer, Timothy T. - Seaweeds
By C. J. Hillson - Sound Production and Sound Reception by Insects:
Fringe, Mable and Hubert - The Ferns and Fern Allies of Pennsylvania
Lord, Thomas R. and Holly J. Travis - The Sucking Lice of North America
Kim, Ke Chung, Harry D. Pratt and Chester J. Stojanovich - The Wingless Crow
By Charles Fergus - Toxigenic Fusarium Species
Marasas, W.F. O, Paul E. Nelson, and T.A. Toussoun - Utilization of Municipal Sewage Effluent and Sludge on Forest and Disturbed Land
Sopper, William E. and Sonja N. Kerr - Valley Forge
By Lorett Treese - Wildlife Population Ecology
Wakeley, James S.