Jeffreys, Harold,  Sir,  1891- <br/><br/>
The future of the earth / 
Harold Jeffreys. 
 - London :  Ed. Kegan Paul, Trench, Trubner &Co. Ltd.,  1929. 
 - 72 p. 
<br/><br/><label>Dewey Class. No.: </label>500  / T375