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    • 1421 Champa, operator's school

    • A teacher demonstrates the operation of a switchboard at the Mountain States Telephone and Telegraph building in Denver, Colorado. Women, students in the operator's training program, sit at desks.
    • Mountain States Telephone and Telegraph Company--People--1920-1930.; Denver (Colo.)--1920-1930.; Classrooms--Colorado--Denver--1920-1930.; Students--Colorado--Denver--1920-1930.; Telephone operators--Colorado--Denver--1920-1930.; Vocational...
    • 1921 June 9

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