Wehrle, E. F. 2000 Mountain Park: A Historic Resources National Park Service, National “Catoctin Capital Region. Young, R. and Norby, L., eds. 2009 Geological Monitoring. Geological Society of America, Boulder, CO.
Wehrle, E. F. 2000 “Catoctin Mountain Park: A Historic Resources National Park Service, National Capital Region. Young, R. and Norby, L., eds. 2009 Geological Monitoring. Geological Society of America, Boulder, CO.