International directory of specialists in plant taxonomy;  with a census of their current interests / 
Compiled by A.C. de Roon. 
 - Utrecht, Netherlands :  International Bureau for Plant Taxonomy and Nomenclature.,  1958. 
 - 266 p. 
 - Regnum vegetabile; a series of publications for the use of plant taxonomists and plant geographers,  Vol. 13 .
 - Regnum vegetabile  Vol. 13 .
<br/><br/>Includes bibliogr. references 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botany--Nomenclature