(537) Erickson, O. F. 



1917. Injury to yellow pine timber by steam logging. J. Forest. 15: 507-508. 



(538) Ernst, Emil. 



1939. Siamese twins in western yellow pines. Yosemite Nature Notes 18(4): 29-30. 



(539) Eslyn, Wallace E. ■ 



1961. New records of forest fungi in the Southwest. Mycologia 52: 381-387. 



(540) Evanko, A. B. 



1953. Forage species and planting season for reseeding cleared and abandoned ponder- 

 osa pine areas in northeastern Washington. U.S. Forest Serv. Northern 

 Rocky Mountain Forest and Range Exp. Sta. Res. Note 119, 5 pp. 



(541) Evenden, James C. 



1926. The pine butterfly, Neophasia menapia Felder. J. Agr. Res. 33: 339-343. 



(542) 

 (543) 



1926. Logging to check pine beetle. Timberman 27(4): 178-180. 



1935. The mountain pine beetle and the Black Hills beetle. U.S. Bur. Entomol. & 

 Plant Quar . , 16 pp. 



(544) 



(545) 



1938. An instance of insect damage resulting from zero-margin selective cutting of 

 ponderosa pine. U.S. Forest Serv. Northern Rocky Mountain Forest and 

 Range Exp. Sta. Appl. Forest. Note 84, 4 pp. 



1940. Effects of defoliation by the pine butterfly upon ponderosa pine. J. Forest. 38: 

 949-955. 



(546) , W. D. Bedard, and G. R. Struble. 



1943. The mountain pine beetle, an important enemy of western pines. U.S. Dep. 

 Agr. Circ. 664, 25 pp. 



(547) Fahnestock, George R. 



1953. Chipping takes the hazard out of logging slash. U.S. Forest Serv. Northern 

 Rocky Mountain Forest and Range Exp. Sta. Res. Note 125, 5 pp. 



(548) and John H. Dieterich. 



1962. Logging slash flammability after five years . U.S. Forest Serv. Intermountain 

 Forest and Range Exp. Sta. Res. Pap. 70, 15 pp. 



(549) andC. A. Wellner. 



1940. Early effects of thinning pure ponderosa pine in western Montana. U.S. Forest 

 Serv. Northern Rocky Mountain Forest and Range Exp. Sta. Res. Note 3, 3 pp 



(550) Fechner, Gilbert H. 



1956. A cubic -foot volume table for ponderosa pine in the northern Black Hills. Colo 

 A & M Coll. Sch. Forest. & Range Manage. Res. Note 2, 2 pp. 



(551) 



1956. A survey of the pulpwood resource in the northern Black Hills. U.S. Forest 



Serv. Rocky Mountain Forest and Range Exp. Sta. , Sta. Pap. 20, 21 pp. 



(552) 



1957. A survey of the pole resource in the northern Black Hills. U.S. Forest Serv. 



Rocky Mountain Forest and Range Exp. Sta., Sta. Pap. 28, 12 pp. 



34 



