Families and genera of spermatophytes recognized by the Agricultural Research Service / 
Charles R. Gunn ... [et al.]. 
 - [Beltsville, Md.] :  [Springfield, VA :  U.S. Dept. of Agriculture, Agricultural Research Service ;  National Technical Information Service [distributor],  1992] 
 - 500 p. :  28 cm. 
 - Technical bulletin ;  no. 1796. .
 - Technical bulletin (United States. Dept. of Agriculture) ;  no. 1796. .
<br/><br/>Incluye referencias bibliográficas (p. 465-470). 
<br/><br/><br/>Ingles 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants--Nomenclature.
<br/><br/><label>Dewey Class. No.: </label>580