International directory of botanical gardens / 
by D.M. Henderson and H.T. Prentice. 
 - 3rd ed. 
 - Scheltema & Holkema, Utrecht-Netherlands :  Bohn,  1977. 
 - v. (various pagings) ;  28 cm. 
<br/><br/> Imprint based on v.2 
<br/><br/><label>ISBN: </label>9031302457 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Botanical gardens--Directories.