pdf BTL History: The Early Years (1875-1925) - 1975 - Extract - Ocr-op-r Popular

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BTL History: The Early Years (1875-1925) - 1975 - Extract - Ocr-op-r

From A History Of Engineering and Science In The Bell System - The Early Years (1875-1925).  71 page extract includes Table of Contents, References (27 pages), Credits and Index (28 pages).  Bookmarked. Contributed by Steph Kerman.

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