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ENVIRONMENTAL MONITORING: 
THE ROLE OF REMOTE SENSING 
by 
L. Sayn-Wittgenstein and A.H. Aldred 
Report for the Working Group on Environmental Monitoring 
Presented to 
Commission VII at the 15th Congress of the 
International Society for Photogrammetry. 
Helsinki, July 11 - 25, 1976 
Forest Management Institute 
Canadian Forestry Service 
Department of the Environment 
Ottawa, Ontario 
July, 1976