Koopowitz, Harold. <br/><br/>
Plant extinction:  a global erisis/ 
Harold Koopowitz and Hilary Kaye. 
 - Washington, D.C.:  Stone Wall Press Inc.,  1983. 
 - 239 p. :  ill.;   24 cm. 
<br/><br/>Bibliography: p.230-231. 
<br/><br/><label>ISBN: </label>0913276448 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants--Extinction.<br/>Plant conservation.<br/>Botany, Economic.