Purves, William K. <br/><br/>
Life :  the science of biology / 
by W.K. Purves, D.Sadava, G.H. Orians, H.C. Heller. 
 - 6th ed. 
 - Sunderland, MA :  Freeman,  2001. 
 - XXXVIII, 1044 p., [90] p. :  ill. ;  28 cm. 
<br/><br/>Index p. [50] 
<br/><br/><label>ISBN: </label>0-7167-3873-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology