MACKINNEY, Landon E. <br/><br/>
A taxonomic revision of the acaulescent blue violets (Viola) of North America / 
Landon E. Mckinney. 
 -- Texas :   Botanical Research Institute of Texas,   1992 
 - 59 p.  il. -- 
 (Sida Botanical Miscellany, ISSN 0833-1475  ; 7).
<br/><br/> Es "I" por Sida, Contributions to Botany 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Violetas
<br/><br/><label>Universal Decimal Class. No.: </label>582(7)