BIBLIOGRAPHY 
1. Bakek. F. S. 
Aspen as a Temporary Forest Type. Jour, of Forestry, vol. 16, 294-300, 
March, 1918. 
2. Aspen Reproduction in Relation to Management. Jour, of Forestry, vol. 
16, 389-398, April, 1918. 
3. Two Races. of Aspen. Jour, of Forestry, vol. 19, 412-413, April, 1921. 
4. Baker, F. S., C. F. Korstian, and N. J. Fetherolf. 
Snowshoe Rabbits and Conifers in the Wasatch Mountains of Utah. 
Ecology, vol. 2, 304-310, October, 1921. 
5. Clements, Frederic E. 
The Life History of Lodgepole Burn Forests. Forest Service Bull. 79, 
U. S. Dept. of Agr., 1910. 
6. Hofer, George. 
The Aspen Borer and How to Control It. Farmers' Bull. 1154, U. S. 
Dept. of Agr. 
7. Korstian, C. F. 
Effect of a Late Spring Freeze upon Forest Vegetation in the Wasatch 
Mountains of Utah. Ecology, vol. 2, 47-53, January, 1921. 
8. Long, W. H. 
An Undescribed Canker of Poplars and Willows Caused by Cytospora 
clirysosperma. Jour, of Agr. Research, vol. 13, 331-343, 1917. 
9. Nisbet, John. 
The Forester, vol. 1, Edinburgh and London, 1905. 
10. Pearson, G. A. 
The Role of Aspen in the Reforestation of Mountain Burns of Arizona 
and New Mexico. Plant World, vol. 17, 249-260, 1914. 
11. Sampson, A. W. 
The Stability of Aspen as a Type. Proceedings of Soc. Am. For., vol. 
11, 86-87, January, 1916. 
12. Effect of Grazing on Aspen Reproduction. Bull. 741, U. S. Dept. of Asr., 
1918. 
13. Sargent, Charles Sprague. 
Manual of the Trees of North America. New York, 1905. 
14. Sudworth, George B. 
Check List of the Forest Trees of the United States. Bull. 17, U. S. 
Dept. of Agr., Division of Forestry, 1898. 
15. Weigle, W. G., and E. H. Frothingham. 
The Aspens: Their Growth and Management. Forest Service Bull. 93, 
U. S. Dept. of Agr., 1911. 
16. Zon, Raphael, and H. S. Graves. 
Light in Relation to Tree Growth. Forest Service Bull. 92, U. S. Dept. 
of Agr., 1911. 
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