Greenwood, Herbert William <br/><br/>
Document photography, individual copying and mass recording / 
byH.W. Greenwood 
 - 3rd ed. 
 - London [&] Newyork :  Focal Press,  [1947] 
 - 160 p. :  Illus,tables,diagrs ;  19 cm. 
<br/><br/> At the head of the title : H.W. Greenwood  H.W. Greenwood is Herbert William Greenwood 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Scientists--Biography
<br/><br/><label>Dewey Class. No.: </label>137