The Telephone and Telephone Exchanges

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The Business Directory of the Telephone Exchange, Philadelphia, 1884

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The Northwestern Telephone Exchange Company Main Exchange, Minneapolis, Minn

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The Telephone Exchange Co. Worcester, Mass

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Maintenance of Automatic Telephone Exchanges

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Practical Telephone Handbook and Guide to the Telephone Exchange

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The American Telephone Journal

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Telephony

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Garden City, Deerfield, and Lakin Telephone Exchange and Business Directory

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Official Directory of the Providence Telephone Exchange Company

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