Aerial Assault: Dead and Dying Ash Trees Pose Hazard from Above (PDF)
Emerald Ash Borer Presentation from UMTownship
http://www.dcnr.state.pa.us/forestry/insectsdisease/eab/
http://ento.psu.edu/extension/trees-shrubs/emerald-ash-borer
Contact your certified arborist for more information:
http://rockwellconsultants.com/