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SOURCES – How people kept in touch before cell phones

The following sources were consulted in the preparation of the article “How people kept in touch before cell phones.”

  1. America Calling: A Social History of the Telephone to 1940
  2. Universal service in telephone history: A reconstruction
  3. Answering the call of automation: how the labor market adjusted to mechanizing telephone operation
  4. Historical Census of Housing Tables: Telephones
  5. Postal history Rates for Domestic Letters Since 1863
  6. FCC Releases Study on Telephone Trends
  7. The telephone answering machine: Mediated presence and the participatory condition