Hopkins, W. J. (1894). Telephone lines and their properties (New ed., rev. and enl.). Longmans, Green.
Chicago Style aipamenaHopkins, William John. Telephone Lines and Their Properties. New ed., rev. and enl. New York: Longmans, Green, 1894.
MLA aipamenaHopkins, William John. Telephone Lines and Their Properties. New ed., rev. and enl. Longmans, Green, 1894.
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