ABC Teletraining Inc

year of pub­li­ca­ti­onISBNauthor(s)title
1988978-1-56016-000-7Frank E. LeeTelephone Theory Principles and Practice
  ''978-1-56016-027-4James H. MillerGrounding
1986978-1-56016-028-1Tom RogersUnderstanding Pcm (ABC Pocket Guide for the Field)