General illumination up to 3000 Lux. Allgemeinbeleuchtung bis zu 3000 Lux. [With other papers concerning lighting by various contributors.] (Translated from) Siemens Elektrodienst, 1963 (5), 2-3; 4-5; 16.
Hetzel, H.
Garston, 
1964.
Reproduced from typewriting.