The world of living things / 
Paul F. Braddwein ... [et al.]. 
 - New York :  Harcourt, Brace & World,  c1964. 
 - xi, 500 p. :  ill. 
 - Harcourt, Brace & World Science Program ; General science. .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adaptation (Biology).<br/>Biology.