Big trees of Pennsylvania /
edited by Bob Clark.
APA Citation
Clark, B., Pennsylvania Forestry Association. (1987). Big trees of Pennsylvania. U.S. Constitution Bicentennial ed. Mechanicsburg, Pa.: Pennsylvania Forestry Association.
MLA Citation
Clark, Bob, and Pennsylvania Forestry Association. Big Trees of Pennsylvania. U.S. Constitution Bicentennial ed. Mechanicsburg, Pa.: Pennsylvania Forestry Association, 1987.
Warning: These citations may not always be complete (especially for serials).