ACKNOWLEDGMENTS 



The authors gratefully acknowledge important assistance 

 in statistical compilation and analysis services provided 

 by A. R, Stage, Principal Mensurationist, Forest Mensura- 

 tion Project; and M. A. Marsden, Statistician, both head- 

 quartered at Moscow, Idaho; and by Mrs. Dorothy Shupe, 

 Statistical Clerk, Division of Forest Economics, Recrea- 

 tion, Engineering, and Utilization Research, Intermoun- 

 tain Station, Ogden, Utah. 



