CONTRIBUTIONS FROM THE UNITED STATES NATIONAL HERBARIUM / 
United States National Herbarium. 
 -- Washington D.C. :   Smithsonian  
 - 1890-  . -- 
<br/><br/>ISSN 0097-161 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botánica
<br/><br/><label>Universal Decimal Class. No.: </label>58