Gentry, Howard Scott <br/><br/>
Rio Mayo plants; a study of the flora and vegetation of the valley of the Rio Mayo, Sonora 

 - Washington, D.C.  Carnegie Institution of Washington  1942 
 - vii,328p.  26cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany
<br/><br/><label>LC Class. No.: </label>QK211.G47