Engel, Fritz-Martin <br/><br/>
Creatures of the earth's crust / 
[by] Fritz-Martin Engel ; translated from the German by J.R. Foster. 
 - London :  Harrap,  c1961. 
 - 206 p. :  ill., plates ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology--History.<br/>Human ecology--History.