LITERATURE 175 



Literature. 



1. Abbe, Cleveland. First report on the relations between 

 climates and crops. Bull. Weather Bureau U. S. Dept. Agric. 

 342:1-386. Au 1905. 



2. Bessey, C. E. Plant migration studies. Univ. Neb. 

 Studies 5: 1-26. Ja 1905. 



3. . The forests and forest trees of Nebraska.) 



Ann. Rep. Neb. State Board Agric. 1899. 



4. Blankinship, J. W. A century of botanical explora- 

 tion in Montana. Montana Agric. Coll. Sci. Studies 1 : 3-31, 1905. 



5. : Report of the botanist. Bull. Mont. Agric. 



Exp. Sta. 32: 38-44, 1902. 



6. Boerker, R. H. Ecological investigations upon the germ- 

 ination and early growth of forest trees, pp 1-89. pi. 1-5. Lin- 

 coln, Neb. Ja. 1916. 



7. Bowman, Isaiah. Forest physiography. New York. 

 1911. 



8. Briggs, Lyman J. and Belz, J. O. Dry farming in re- 

 lation to rainfall and evaporation. Bull. Bureau Plant Ind. U. S. 

 Dept. Agric. 188:1-71. pi. 1. f. 1-23. N 1910. 



9. Calhoun, Fred H. H. The Montana lobe of the Kee- 

 watin Ice Sheet. Prof. Paper U. S. Geol. Surv. 5 : 1-62. pi. 

 1-7 f. 1-30. 1906. 



10. Calkins, P. C. A geological reconnaissance of northern 

 Idaho and northwestern Montana. Bull. U. S. Geol. Surv. 384: 

 1-112. pi. 1. 1909. 



11. Gary, Merritt. Life zone investigations in Wyoming. 

 U. S. Dept. Agric. Biol. Surv. N. A. Fauna 42 : 1,95. /. 1-17. 

 1917. 



12. Clements, F. B. The life history of lodgepole burn 

 forests. Bull. U. S. Dept. Agric. 79 : 1-56. pi. 1-6. Ja. 1910. 



13. Cooper, William S. Alpine vegetation in the vicinity 

 of Long's Peak, Colorado. Bot. Gaz. 45: 319-337. /. 1-8. My 

 1908. 



14. Coulter, John M. A catalogue of plants collected in 

 1872 in portions of Montana, Idaho, Wyoming and Utah. Ann. 

 Rep. U. S. Geol. Surv. Terr. 6 : 747-792. 1873. 



