How to light a colliery by electricity
Sydney Ferris WalkerAñadir a mi colección
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IES approved method for electrical and photometric measurements of general service incandescent filament lamps
Illuminating Engineering Society of North America. Subcommittee on Photometry of Light Sources of the IES Testing Procedures Committee.
1991
AñadirIES approved method for total and diffuse reflectometry
Illuminating Engineering Society of North America. Subcommittee on Photometry of Indoor Luminaires of the IES Testing ProceduresCommittee.
1990
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