Delano, H. L., & Wilshusen, J. P. (2001). Landslides in Pennsylvania (2nd ed.). Harrisburg, Pa.: Pennsylvania Geological Survey.
Chicago Style CitationDelano, Helen L., and John P. Wilshusen. Landslides in Pennsylvania. 2nd ed. Harrisburg, Pa.: Pennsylvania Geological Survey, 2001.
MLA CitationDelano, Helen L., and John P. Wilshusen. Landslides in Pennsylvania. 2nd ed. Harrisburg, Pa.: Pennsylvania Geological Survey, 2001.
Warning: These citations may not always be 100% accurate.