The naturalists' directory international 

 - South Orange, N. J. :  PCL Publications,  1972 
 - v. 
<br/><br/> -- -- Suplemento 
<br/><br/><label>LCCN: </label>30866 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Científicos--Directorios.
<br/><br/><label>Dewey Class. No.: </label>506.9  / N3