Recomendations for photometric integrators / 
British Standard Institution 
 - London :  British Standards Institution,  1961 
 - 10 pages ;  23 cm. 
 - British standard ;  BS 354 : 1961 .
 - British standard ;  BS 354 : 1961 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fluorescent lamps--Standard<br/>Electric lamps--Standard