REFERENCES 43 



is possible. As yet they have been used to only a small 

 extent in this country. 



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3. WILLIAMSON, A. W. Cottonwood in the Mississippi Valley. Bulletin 

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5. PEARSON, G. A. Management of Pine and Spruce in Sweden. Review 

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6. MASON, D. T. Utilization and Management of Lodgepole Pine in the 

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BRYANT, R. C. Silviculture at Axton and in the Adirondacks Generally. 



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FROTHINGHAM, E. H. White Pine under Forest Management. Bulletin 13, 

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MATTOON, W. R. Shortleaf Pine: Its Economic Importance and Forest 

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RECKNAGEL, B. A. Some Aspects of European Forestry. Forestry Quarterly, 

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