152 UNIVERSITY OF COLORADO STUDIES 



Gale, Hoyt S., "Carnotite in Rio Blanco Co., Colorado," U. S. Geol. Surv., Bull. 



No. 315, pp. 1 10-17, 1907. 

 , "Coal-fields of the Dan forth Hills and Grand Hogback in northwestern 



Colorado," U. S. Geol. Surv., Bull. No. 316, pp. 264-301, 1907. 

 , "Gold placer deposits near Lay, Routt Co., Colorado," U. S. Geol. Surv., 



Bull. No. 340, pp. 84-95, 1908. 

 , "Geology of the Rangely oil district, Rio Blanco Co., Colorado," U. S. 



Geol. Surv., Bull. No. 350, 1908. 

 , " Coal-fields of northwestern Colorado and northeastern Utah," U. S. Geol. 



Surv., Bull. No. 341, pp. 283-315, 1909. 

 Gray, Asa, and Hooker, Joseph D., "The vegetation of the Rocky Mountain 



Region and a comparison with that of other parts of the world," Bull. U. S. 



Geol. and Geog. Surv. of Terr., Vol. VI, No. 1, pp. 1-62, 1880. 

 Hayden, F. V., "Geological and geographical atlas of Colorado and portions of 



adjacent territory," Sheets V and XI, U. S. Geol. and Geog. Surv. Terr., 1881. 

 Henderson, Junius, "The Mollusca of Colorado," Univ. Colo. Studies, Vol. IV, 



pp. 77-96, 167-85, 1906. 

 Hopkins, F. H., "The bobolink in Colorado," The Auk, Vol. XXIII, p. 461, 1906. 

 Ladd, Story B., "Topographical report of northern division, 1874;" Eighth Ann. 



Rept. U. S. Geol. and Geog. Surv. Terr. (Hayden Survey) for 1874, pp. 435-42, 



1876. 

 Phillips, F. J., "A Study of pinyon pine," Bot. Gaz., Vol. XLVIII, pp. 216-23, 



September, 1909. 

 Pool, Raymond J., "Histological studies in the Artemisia formation," Univ. of 



Neb. Studies, Vol. VIII, pp. 1-28, October, 1908. 

 Richardson, G. B., "Reconnaissance of the Book Cliffs coal-field, between Grand 



River, Colorado, and Sunnyside, Utah," U. S. Geol. Surv., Bull. No. 316, pp. 



302-20, 1907. Same title, Id. Bull. No. 371, 1909. 

 Rockwell, Robert B., "An annotated list of the birds of Mesa County, Colorado," 



The Condor, Vol. X, pp. 152-80, 1908. 

 Rydberg, P. A., "Flora of Colorado," Agric. Exper. Station of Colorado Agric. 



College, Bull. 100, pp. 1-448, 1906. 

 Warren, Edward R., "The mammals of Colorado," Colorado College Publications, 



Gen. Series No. 19, pp. 225-274, 1906. 

 , "Further notes on the mammals of Colorado," Colorado College Publications, 



Gen. Series No. ^, pp. 59-90, 1908. 

 , "Northwestern Colorado bird-notes," The Condor, Vol. X, pp. 18-26, 



1908. [Includes also some notes on mammals.] 

 , "Notes on the birds of southwestern Montrose County, Colorado," The 



Condor, Vol. XI, pp. 11-17, 1909. 



