Origin and evolution of gymnosperms 
edited by Charles B. Beck 
 - New York  Columbia University Press  1988 
 - xiv, 504 p. : ill. ; 24 cm. 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>023106358X 
<br/><br/><label>ISSN: </label>88014758 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gymnosperms - Evolution<br/>Gymnosperms - Origin<br/>Gymnosperms, Fossil
<br/><br/><label>Dewey Class. No.: </label>561.5 BEC