Map of Southern California showing the early transmission line corridors belonging to Pacific Light and Power, Southern California Edison and Southern Sierras Power Co
Map of Southern California showing the early transmission line corridors belonging to Pacific Light and Power, Southern California Edison and Southern Sierras Power Co. before the time of Edison's acquisition of PL&P. No number originally assigned by Cal. Electric and - no documentation included.
Southern California Edison Photographs and Negatives California Electric Power (CEP) Southern California Edison Photographs and Negatives, Huntington Digital Library
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