Swallen, Jason R.  1903-1991. <br/><br/>
The awnless annual species of Muhlenbergia. 

 - Washington,  U.S. Govt. Print. Off.,  1947. 
 - 203-208 p.  25 cm. 
 - Smithsonian Institution.  United States National Museum. Contributions from the United States National Herbarium,  v. 29, p. 4 .
 - United States National Museum.  Contributions from the United States National Herbarium ;  v. 29, pt. 4. .
<br/><br/><label>LCCN: </label>s  48000001  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Grasses.<br/>Muhlenbergia.
<br/><br/><label>LC Class. No.: </label>QK1  / .U5 vol. 29, pt. 4 
<br/><br/><label>Dewey Class. No.: </label>584.9