The botanic gardens conservation strategy / 
[Prepared for IUCN and WWF by V.H. Heywood]. 
 - [London] :  IUCN Botanic Gardens Secretariat,  1989. 
 - xii, 60 p. ;  27 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plant conservation<br/>Botanical Gardens