home
>
manufacturers
>
bth
>
advertisements
> lamps stay bright longer
new
manufacturers
installations
collection
restorations
timeline
identification
publications
glossary
mailing list
site map
links
about
contact
bth: lamps stay bright longer
Published in:
Public Lighting Engineer No. 26, Vol. 7
, July-September 1942
Published in:
Public Lighting Engineer No. 27, Vol. 7
, October-December 1942