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

 - 4th 
 - London  Routledge And Kegan Paul USA     1955 
 - 432p  cm. 
<br/><br/><label>Standard No.: </label>9,624 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>INDUSTRIAL ARTS
<br/><br/><label>Dewey Class. No.: </label>M:A.N, J5