THE AUTHOR 



GERALD E. REHFELDT is a plant geneticist at the Forestry Sciences 

 Laboratory, Moscow, Idaho. His research includes studies 

 of the ecological genetics of Northern Rocky Mountain conifers, 

 primarily Douglas-fir. 



ACKNOWLEDGMENT 



I gratefully appreciate the thoughtful criticism of 

 Drs. C. Gler\im, Ontario Forest Research Centre, Maple, Ontario; 

 F. C. Sorensen, USDA Forest Service, Corvallis, Oregon; and 

 D. T. Lester, Crown Zellerbach, Wilsonville, Oregon. S. P. Wells, 

 USDA Forest Service, Moscow, Idaho, provided excellent technical 

 assistance, and W. R. Wykoff, USDA Forest Service, Moscow, Idaho,- 

 assisted with computer programming. 



