Pringle, Laurence P. <br/><br/>
The only earth we have / 
Laurence Pringle. 
 - London :  Macmillan,  c1969. 
 - 86 p. :  ill. ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Pollution.<br/>Natural resources.