Wolfe, Jack A.  1936- <br/><br/>
Taxonomic revision of the Spermatopsida of the Oligocene Creede flora, southern Colorado / 
by Jack A. Wolfe and Howard E. Schorn. 
 - [Washington]:   [United States Government Printing Office],   [1991].  
 - iv, 40 p. :  ill., tables ;  28 cm. 
 -  1923 .
<br/><br/> First printing 1990.  Second printing 1991. 
<br/><br/>Includes bibliographical references (p. 38-40). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Paleobotany--Oligocene<br/>Paleobotany--Colorado
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Creede Formation (Colorado)
<br/><br/><label>Dewey Class. No.: </label>561.19788