Crowther, J.G. <br/><br/>
Discoveries and inventions of the 20th century 

 - London  ; Routledge  , 1966 
 - xviii,434p. 
<br/><br/><label>ISBN: </label> 73.50 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science<br/>Scientific Inventions
<br/><br/><label>Dewey Class. No.: </label>509  / CRO