Congress of the International Society of Photogrammetry 
Helsinki 1976 
Commission VII 
Invited Paper 
"Vegetation Damage and Remote Sensing: 
Principal Problems and Some Recommendations" 
by 
9 Peter A. Murtha 
Faculty of Forestry, University of British Columbia 
Vancouver, Canada 
U.D.C. 528.711.1.029.672 
528.77:634.0.4