Norstog, Knut <br/><br/>
Plant biology / 
Knut Norstog and Robert W. Long 
 - Philadelphia:  W. B. Saunders company,  1976 
 - vi, 585p.: ill 
<br/><br/> Includes references and index 
<br/><br/><label>ISBN: </label>072166864x 
<br/><br/><label>LC Class. No.: </label>QK 47