Davis, P. H. <br/><br/>
The identification of flowering plant families :  including a key to those native and cultivated in north temperate regions / 
P. H. Davis, J. Cullen 
 - 2nd ed. 
 - Cambridge :  Cambridge University Press,  1979 
 - 113 p. ;  20 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>0521221110  hardcover 0521293596  pbk 
<br/><br/><label>LCCN: </label>78-8125 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Angiosperms--Identification<br/>Flowers--Identification