(2209) Wittkopf, J. J., and M. D. MacDonald. 



1949. Dielectric properties of ponderosa pine at high frequencies. Oreg. State Coll. 

 Eng. Exp. Sta. Bull. 29, 23 pp. 



(2210) Wollum, A. G. , II, and C. T. Youngberg. 



1964. The influence of nitrogen fixation by non- leguminous woody plants on the growth 

 of pine seedlings . J. Forest. 62: 316-321. 



(2211) Wood, David L. 



1962. The attraction created by males of a bark beetle Ips confusus (Le Conte) attacking 

 ponderosa pine. Pan-Pacific Entomol. 38: 141-145. 



(2212) 



1962. Experiments on the interrelationship between oleoresin exudation pressure in 



Pinus ponderosa and attack by Ips confusus (Lec.) (Coleoptera: Scolytidae). 

 Can. Entomol. 94: 473-477. 



(2213) and R. W. Bushing. 



1963. The olfactory response of Ips confusus (LeConte) (Coleoptera: Scolytidae) to the 



secondary attraction in the laboratory . Can. Entomol. 95: 1066-1078. 



(2214) and J. P. Vite. 



1961. Studies on the host selection behavior of Ips confusus (LeConte) (Coleoptera: 



Scolytidae) attacking Pinus ponderosa. Contrib. Boyce Thompson Inst. 21: 

 79-95. 



(2215) Wood, R. O. 



1964. Notes on distribution and hosts of the weevils Pissodes schwarzi Hopk. and 



Pissodes curriei Hopk. in British Columbia and Yukon territory. B.C. 

 Entomol. Soc. Proc. 61: 42-44. 



(2216) Woodfin, R. O. , Jr. 



1958. Effect of dates of poisoning and harvesting on peelability of Black Hills ponderosa 

 pine. U.S. Forest Serv. Rocky Mountain Forest and Range Exp. Sta. Res. 

 Note 34, 4 pp. 



(2217) 

 (2218) 



1960. Taper in Black Hills ponderosa pine sawtimber trees. U.S. Forest Serv. Rocky 

 Mountain Forest and Range Exp. Sta. Res. Note 52, 3 pp. 



1963. Treating and harvesting interval for debarking ponderosa pine pulpwood with 

 sodium arsenite. TAPPI 46: 73-75. 



(2219) and E. F. Landt. 



1960. Conversion of cubic-foot volumes of Black Hills ponderosa pine to cords. U.S. 



Forest Serv. Rocky Mountain Forest and Range Exp. Sta. Res. Note 31, 2 pp. 

 (Revised) 



(2220) Woods, J. B. 



1931. Selective cutting in western yellow pine. Amer. Forests 37: 17-19, 60-61. 



(2221) Woodward, K. W. 



1917. Tree growth and climate in the United States. J. Forest. 15: 521-531. 



(2222) Wooldridge, David D. 



1960. Watershed disturbance from tractor and skyline crane logging. J. Forest. 58: 

 369-372. 



(2223) 



1965. Tracing soil particle movement with Fe-59. Soil Sci. Soc. Amer. Proc. 29: 

 469-472. 



137 



