(848) Hutchison, S. Blair, and John H. Wikstrom. 



1952. Resource factors affecting the feasibility of pulp mills in eastern Montana. 



U.S. Forest Serv. Northern Rocky Mountain Forest and Range Exp. Sta., 

 Sta. Pap. 34, 35 pp. 



(849) and John H. Wikstrom. 



1957. Industrial opportunities in the Headwaters Timber Development Unit. U.S. For- 

 est Serv. Intermountain Forest and Range Exp. Sta. Res. Pap. 45, 70 pp. 



(850) , John H. Wikstrom, Roscoe Burwell Herrington, and Robert E. Benson. 

 1965. Timber management issues on Utah's north slope. U.S. Forest Serv. Res. 



Pap. INT-23, 23 pp. 



(851) Hyun, Sin Kyu. 



1954. Induction of polyploidy in pines by means of Colchicine treatment. Silvae Genet. 

 3(2): 25-33. 



(852) Iloff, P. M., Jr., and N. T. Mirov. 



1954. Composition of gum turpentines of pines . XIX. A report of Pinus ponderosa 



from Arizona, Colorado, South Dakota, and northern Idaho. Amer. Pharm. 

 Assoc. J. Sci. Ed. 43: 373-378. 



(853) Immelman, W. F. E. 



1957. Quality and performance of sliced shook from small ponderosa pine logs. U.S. 

 Forest Serv. Forest Prod. Lab. Rep. 2076, 40 pp. 



(854) Irwin, R. E. 



1928. How a ponderosa pine log is cut. Timberman 29(6): 154. 



(855) Isaac, L. A. 



1960. Leo A. Isaac on silviculture. Oreg. State Coll., 32 pp. 



(856) Ivory, E. P. 



1925. California white pine . Timberman 26(8): 252. 



(857) Jackson, L. W. R. 



1952. Radial growth of forest trees in the Georgia Piedmont. Ecology 33: 336-341. 



(858) Jackson, Willard L. 



1960. A trial of direct control of pine engraver beetles on a small logging unit. U.S. 



Forest Serv. Pacific Southwest Forest and Range Exp. Sta. Misc. Pap. 44, 

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1961. Board foot volumes for young- growth mixed -conifer timber. U.S. Forest Serv. 



Pacific Southwest Forest and Range Exp. Sta. Res. Note 182, 2 pp. 



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1962. Guide to grading defects in ponderosa and sugar pine logs. U.S. Forest Serv. 



Pacific Southwest Forest and Range Exp. Sta. , 34 pp. 



(861) Jacobson, N. G. 



1924. Life and growth of pondosa pine. Four L Lbr. News 6(34): 48-49. 



(862) Jaenicke, A.J. 



1921. Pine beetle infestation in government timber. Timberman 22(10): 37. 



(863) and M. H. Forester. 



1915. The influence of a western yellow pine forest on the accumulation and melting 

 of snow. U.S. Monthly Weather Rev. 3: 115-126. 



