Armstrong, E.F. . <br/><br/>
Chemistry in the Twentieth Century /  Textual Documents 
E.F.Armstrong. 
 - 1st ed. / 
 - London :  Ernest Benn Limited ,  1924. 
 - 281p. ;  22cm. 
<br/><br/><label>Subjects--Index Terms: </label>Chemistry G-Chemistry 
<br/><br/><label>Dewey Class. No.: </label>540  / Ar 57 C