Photographic flash equipment.  Part 5,  methods for determination of the light output of expandable photoflash lamps / 
British Standards Institution. 
 - 3 pages :  illustrations ;  33cm. 
 - British standard ;  BS 5841 : Part 5 : 1980 .
 - British standard ;  BS 5841 : Part 5 : 1980 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photography--Equipment and supplies.<br/>Photographic optics.<br/>Photography--Light filters.<br/>Photography--Lighting.