Factors that decrease the light of electric cap lamps

Author: Hooker, A. B.
Additional Authors: Zellers, D. H.
Year: 1935
Document Type: BMRA
Issuing Agency: U.S. Dept. of the Interior, Bureau of Mines,
SUDOC: I 28.23:3292
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;
Report Number: 3292
Subject: Electric lamps
Link: https://hdl.handle.net/2027/mdp.39015078496257

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