BLUMER, J. C. 1906. Rocky Mountain seedling 

 growth. Forestry Quart. 4: 98-105. 



Natural pruning; Pike's Peak Forest Reserve. 



BOE, K. N. 1954. Periodicity of cone crops for 

 five Montana conifers. Mont. Acad. Sci. 

 Proc. 14: 5-9. 



Compares seed production west and east of 

 the Continental Divide in Montana. 



BOURCHIER , R. J. 1953. Forest disease sur- 

 vey: yellow witches' broom of spruce. Forest 

 Insect Dis. Surv. Canada Rpt. 1952: 123. 



BOWERS, NATHAN A. 1956. Cone-bearing 

 trees of the Pacific Coast. 169 pp. Palo Alto, 

 Calif.: Pacific Books. 



BOWMAN, ISAIAH. 1911. Forest physiography. 

 759 pp. New York: John Wiley and Sons, Inc. 



A general review of early United States forest 

 literature stressing distribution. 



BOYCE.J. S. 1943. Host relationships and 

 distribution of conifer rusts in the United 

 States and Canada. Conn. Acad. Arts and 

 Sci. Trans. 35: 329-482. 



Comprehensive list of pathogenic rust fungi; 

 host indexes . 



BOYD, RAYMOND J. , JR. 1952. Effect of har- 

 vesting methods on reproduction in the moun- 

 tain Engelmann spruce-alpine fir type. U.S. 

 Forest Serv. , Rocky Mountain Forest and 

 Range Expt. Sta. Res. Note 11, 2 pp. 



Describes three different harvesting methods 

 and compares their effects. 



BRADLEY, G. A. 1957. Aphids of the genus 

 Cinara Curtis in Canada. Canada Dept. Agr. , 

 Div. Biol. Bimo. Prog. Rpt. 13: 1. 



BRANDEGEE, T. S. 1880. Timber line in the 

 Sawatch Range . Bot. Gaz. 5: 125-126. 



Ecological notes about Engelmann spruce. 



BRANDEGEE, T. S. 1899. Teton Forest Re- 

 serve. U.S. Geol. Surv. Ann. Rpt. 19,1897- 

 98, Part V-Forest reserves: 191-212. 



BRANDEGEE, T. S. 1899. Yellowstone Park 

 Forest Reserve. U.S. Geol. Surv. Ann. Rpt. 

 19, 1897-98, Part V-Forest reserves: 213- 

 216. 



Distribution; Engelmann spruce is not 

 abundant . 



BRAY, J. R. , and G. J. STRUIK. 1963. Forest 

 growth and glacial chronology in eastern 

 British Columbia, and their relation to recent 

 climatic trends. Can. Jour. Bot. 41: 1245- 

 1271. 



BRAYSHAW, T. C. 1953. An approach to the 

 determination of moisture requirements for 

 the germination of seeds of Douglas fir, 

 ponderosa pine, and Engelmann spruce. Brit. 

 Columbia Univ. Forest Club Res. Note 8, 6 pp. 



BRIGHT, DONALD E. , JR. 1963. Bark beetles 

 of the genus Dryocoetes (Coleoptera: Scolyti- 

 dae) in North America. Ent. Soc. Amer. Ann. 

 56: 103-115. 



BRITISH COLUMBIA DEPT. LANDS. 1944. 



Report of the Forest Branch for the year end- 

 ed December 31st, 1943. King's Printer, 

 Victoria, B.C. 71 pp. 



Experiment in selective logging of Engelmann 

 spruce stand. 



BRITISH COLUMBIA DEPT. LANDS AND 



FORESTS. 1953. Engelmann spruce bark - 

 beetle. Rpt. 1952: 60. 



BRITISH COLUMBIA DEPT. LANDS AND 



FORESTS. 1957. The forest resources of 

 British Columbia. 2 vols. 888 pp. 



BRITTON, NATHANIEL LORD, and 



JOHN ADOLPH SHAFER. 1908. North Amer- 

 ican trees. 894 pp. New York: Henry Holt. 



General description of Engelmann spruce. 



BR OCKMAN, C. FRANK. 1933. The forests of 

 Mt. Rainier. Nat. Hist. 33: 523-532. 



Engelmann spruce is noticeable in certain 

 locations of the subalpine regions. 



BROCK MAN, C. FRANK. 1949. Trees of Mt. 

 Rainier National Park. 49 pp. Seattle: Univ. 

 Wash. Press. 



BROWN, A. W. A. 1941. Foliage insects of 

 spruce in Canada. Canada Dept. Agr. , For- 

 est Insects Invest. Div. Ent. Pub. 712, Tech. 

 Bui. 31, 29 pp. 



BROWN, A. W. A. (See Halliday and Brown. 

 1943) 



