SUPPLEMENT 



DAY, R. J. , and P. J. B. DUFFY. 1963. 



Regeneration after logging in the Crowsnest 

 Forest. Canada Dept. Forestry, Res. Branch 

 Pub. 1007, 32 pp. 



HAIG, I. T. , K. P. DAVIS, and R. H. 



WEIDMANN. 1941. Natural regeneration in 

 the western pine type. U.S. Dept. Agr., 

 Tech. Bui. 767, 99 pp. 



Factors are discussed that affect natural 

 regeneration of conifers including Engelmann 

 spruce. 



LEIBERG, JOHN B. 1904. Forest conditions in 

 the Little Belt Mountains Forest Reserve, 

 Montana, and the Little Belt Mountains 

 Quadrangle. U.S. Dept. Int., Geol. Surv. 

 Prof. Paper 30, 75 pp. 



Describes community composition based on 

 volume (B.M.), reproduction, and size -age re- 

 lationship of Engelmann spruce. 



PATTEN, D. T. 1963. Light and temperature 

 influence on Engelmann spruce seed germina- 

 tion and subalpine forest advance. Ecology 

 44: 817-818. 



SHEARER, RAYMOND C. 1960. First-year 

 mortality of coniferous seedlings in the 

 western larch-Douglas -fir type. Mont. Acad. 

 Sci. Proc. 20: 18-19. (Abstract.) 



TOUMEY, JAMES W. , and CLARENCE F. 



KORSTIAN. 3ded. 1954. Seeding and plant- 

 ing in the practice of forestry. 520 pp. New 

 York: John Wiley and Sons, Inc. 



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