Rydberg, Per Axel,  1860-1931. <br/><br/>
Flora of Colorado / 
By P.A. Rydberg 
 - 447p. ;  24cm. 
 - Bulletin (Colorado Agricultural Experiment Station);  no. 100 .
 - Bulletin (Colorado Agricultural Experiment Station);  no. 100. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany--Colorado.
<br/><br/><label>Dewey Class. No.: </label>581.9788