Barrett, William James. <br/><br/>
35mm microfilming for drawing offices / 
by W. J. Barrett. 
 - London :  Focal Press,  c1970. 
 - 135 p. :  ill. 
 - Reprographic library .
<br/><br/><label>ISBN: </label>0240506987 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Microphotography.<br/>Engineering drawings.