J. Douglas Edwards (Edwards, J. Douglas)

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  via
  How to Master the Art of Selling
  by Tom Hopkins, J. Douglas Edwards
  Softcover, Grand Central Publishing, ISBN 0446386367 (0-446-38636-7)
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  Sales Closing Power
  by J. Douglas Edwards
  Softcover, Ljr Group, ISBN 0942645030 (0-942645-03-0)