pdf BTL History 1: The Early Years (1875-1925) - 1975 Popular
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History_of_Engineering_and_Science_in_the_Bell_System_-_The_Early_Years_1875-1925_tci.pdf
1090 pages. 50MB. A History of Engineering and Science in the Bell System - The Early Years (1875-1925). First printing - 1975. Text searchable. Relatively low res images to keep file size low. Find higher resolution images in the version posted on archive.org (about 380MB), but it is missing pages 446-7, 556-7, 664-5, 942-3 and 994-5. Processed by Karl Brose, Jack Ryan, Sam Hallas and Paul Fassbender.
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