Mixed Materials

Annual telephone exchange reports, 1915-1951

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Summary

Annual reports by exchanges of telephone companies showing fixed capital installed in and removed from exchange systems at the beginning of each year, reserve for accrued depreciation, operating re...

Annual reports by exchanges of telephone companies showing fixed capital installed in and removed from exchange systems at the beginning of each year, reserve for accrued depreciation, operating revenue and expenses, and distribution of overhead charges.

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