Walker, Egbert H.  1899-1991. <br/><br/>
Plants collected by R. C. Ching in southern Mongolia and Kansu Province, China. 
By Egbert H. Walker. 
 - Washington,  U.S. Govt. Print. Off.,  1941. 
 - v, 563-675, vii-xiii p.  illus., pl. 21-27 (incl. fold. map) on 4 l,  25 cm. 
 - Smithsonian Institution.  U. S. National Museum.  Contributions from the U. S. National Herbarium,  v. 28, pt. 4 .
<br/><br/> Issued July 22, 1941.  "Report of the expedition.  By R. C. Ching": p. 573-593. 
<br/><br/>"Principal publications on Kansu, mostly botanical": p. 566-568 and index. 
<br/><br/><label>LCCN: </label>agr41000524  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany--China--Gansu Sheng.<br/>Botany--Mongolia.
<br/><br/><label>LC Class. No.: </label>QK1  / .U5 vol. 28, pt. 4 
<br/><br/><label>Dewey Class. No.: </label>450.C76  580.74