Carl Oppedahl (Oppedahl, Carl)

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  Inside the Trs-80 Model 100
  by Carl Oppedahl
  Softcover, Weber System, ISBN 0938862316 (0-938862-31-6)
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  The Phone Book: How to Get the Telephone Equipment and Service You Want and Pay Less
  by Carl Oppedahl
  Softcover, St Martins Pr, ISBN 089043364X (0-89043-364-X)