Specification for microform readers / 
British Standards Institution. 
 - 5 leaves :  illustrations ;  33 cm. 
 - British standard ;  BS 4191 : 1976 .
 - British standard ;  BS 4191 : 1976 .
<br/><br/><label>ISBN: </label>0580093905 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Reader-printers (Microphotography)<br/>Microphotography--Equipment and supplies.<br/>Microform.