Paul B. Downing (Paul B. Downing Ph.D.)

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• 
  The Economics of Urban Sewage Disposal.
  

  by Paul B. Downing

  ISBN 9780275025465 (978-0-275-02546-5)
  Hardcover, Frederick A. Praeger, Publishers New York, 1969

  
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• 
  Environmental economics and policy
  

  by Paul B. Downing

  ISBN 9780316191807 (978-0-316-19180-7)
  Softcover, Little, Brown

  
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• 
  Handbook of Western Fly Fishing (DK Pocket)
  

  by Paul B. Downing

  ISBN 9780962531163 (978-0-9625311-6-3)
  Softcover, Majestic Press, 2001

  
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• 
  Opal & Gemstone Jewelry: Cutting*Designing*Setting
  

  by Paul B. Downing Ph.D.

  ISBN 9780981733609 (978-0-9817336-0-9)
  Softcover, Majestic Press, Inc., 2008

  
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• 
  Opal: Advanced Cutting & Setting
  

  by Paul B. Downing

  ISBN 9780962531156 (978-0-9625311-5-6)
  Softcover, Majestic Pr, 2001

  
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• 
  Opal adventures
  

  by Paul B. Downing

  ISBN 9780962531132 (978-0-9625311-3-2)
  Hardcover, Majestic Pr, 1993

  
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  › Find signed collectible books: 'Opal Adventures'
  

  More editions of Opal adventures:

  • Opal adventures: ISBN 9780962531101 (978-0-9625311-0-1)
    Hardcover, Majestic Gems & Carvings, 1990
  • Opal Adventures: ISBN 9780962531132 (978-0-9625311-3-2)
    Hardcover, Majestic Pr, 1993
• 
  Opal Cutting Made Easy
  

  by Paul B. Downing

  ISBN 9780962531149 (978-0-9625311-4-9)
  Softcover, Majestic Pr, 1993

  
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• 
  Opal Identification and Value
  

  by Paul B. Downing

  ISBN 9780962531187 (978-0-9625311-8-7)
  Hardcover, Majestic Pr, 2002

  
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  › Find signed collectible books: 'Opal Identification and Value'
  

  More editions of Opal Identification and Value:

  • Opal, Identification and Value: ISBN 9780962531125 (978-0-9625311-2-5)
    Hardcover, Majestic Press, 1992
  • Opal Identification and Value: ISBN 9780962531187 (978-0-9625311-8-7)
    Hardcover, Majestic Pr, 2002