THE AUTHOR 



DAVID W. HANN is assistant professor of forest mensuration in the 



Department of Forest Management, School of Forestry, at Oregon 

 State University, Corvallis, Oreg. From 1971 to 1978 he was 

 a research forester working on problems of inventory techniques 

 for the Renewable Resources Evaluation research work unit in 

 Ogden, Utah. He holds a B.S. degree in forest management 

 (1968) and an M.S. degree in forest mensuration (1970) from 

 Oregon State University, and a Ph.D. degree in forest mensur- 

 ation (1978) from the University of Washington, Seattle. 



