REFERENCES 



Baker, F. S. 1929. Effect of excessively high temperatures on coniferous 

 reproduction. J. For. 27:949-975. 



Barrett, J. W. 1962. Regional Silviculture of the United States. Ronald 

 Press , New York. 



Braun, E. L. 1950. Deciduous Forests of Eastern North America. The 

 Blakiston Co., Philadelphia. 



Canavera, D. S. 1977. The status of tree improvement programs for northern 

 tree species. U.S. For. Serv. Gen. Tech. Rep. NE-29. 



Cline, A. C, and S. H. Spurr. 1942. The virgin upland forest of central New 

 England. Harv. For. Bull. 21. 



Coolidge, P. T. 1963. History of the Maine Woods. Furbush-Roberts Printing 

 Co. , Bangor, ME . 



Cooperative Forestry Research Unit. 1979. Annual Report 1978. Misc. Rep. 

 No. 212. School of Forest Resources, University of Maine, Orono , ME. 



Ferguson, R. H. , and N. P. Kingsley. 1972. The timber resources of Maine. 

 U.S. For. Serv. Resour. Bull. NE-26. 



Filip, S. M. 1967. Harvesting costs and returns under 4 cutting methods in 

 mature beech-birch-maple stands in New England. U.S. For. Serv. Res. Pap. 

 NE-87. 



Fowells, H. A. 1965. Silvics of Forest Trees of the United States. U.S. 

 Dept. Agric. Agric. Handb. 271. 



Frank, R. M. , and J. C. Bjorkbom. 1973. A silivicultural guide for spruce- 

 fir in the northeast. U.S. For. Serv. Gen. Tech. Rep. NE-6. 



Frothingham, E. H. 1914. White pine under forest management. U. S. Dept. 

 Agric. Bull. 13. 



Gilbert, A. M. , and V. S. Jensen. 1958. A management guide for northern 

 hardwoods in New England. U.S. For. Serv. Res. Pap. 112. ( Formerly U.S. 

 For. Serv. Northeast For. Exp. Stn. Pap.) 



Hart, A. C. 1964. Spruce-fir silviculture in northern New England. Proc. 

 Soc. Am. For. 1963:107-110. 



Hepting, G. H. 1971. Diseases of Forest and Shade Trees of the United 

 States. U.S. Dep . Agric. Handb. 386. 



Holman, G. T. 1977. The Effects of Mechanized Harvesting on Site and Soil 

 Conditions in the Spruce-fir Regions of North Central Maine. M.S. Thesis. 

 School of Forest Resources, University of Maine, Orono, ME. 



19-27 



10-80 



