| 1. 
  |  | Title: Imaging and Information Storage Technology by Wolfgang Gerhartz
 ISBN: 089573978X
 Publisher: John Wiley & Sons Inc
 Pub. Date: 01 October, 1991
 List Price: $115.00
 Amazon.com Price: $115.00
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| 2. 
  |  | Title: Enzymes in Industry: Production and Applications by Wolfgang Gerhartz
 ISBN: 3527279849
 Publisher: John Wiley & Sons Inc
 Pub. Date: May, 1990
 List Price: $168.00
 Amazon.com Price: $168.00
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| 3. 
  |  | Title: Ullmann's Encyclopedia of Industrial Chemistry, (Ullmann's Encyclopedia of Industrial Chemistry) by Wolfgang Gerhartz, Barbara Elvers, Michael Ravenscroft, James F. Rounsaville, Gail Schulz, Hertha Buchholz
 ISBN: 3527201432
 Publisher: Wiley-VCH
 Pub. Date: 31 December, 1989
 
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| 4. 
  |  | Title: Ullmann's Encyclopedia of Industrial Chemistry: Unit Operations Ii, Vol B3 (Ullmann's Encyclopedia of Industrial Chemistry) by Wolfgang Gerhartz, Barbara Elvers, Fritz Ullmann
 ISBN: 0895735385
 Publisher: John Wiley & Sons Inc
 Pub. Date: 01 May, 1989
 List Price: $265.00
 Amazon.com Price: $265.00
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| 5. 
  |  | Title: Ullmann's Encyclopedia of Industrial Chemistry: Vol A-11 by Wolfgang Gerhartz, Y. Stephen Yamamoto, Barbara Elvers, J Rounsaville
 ISBN: 0895731614
 Publisher: John Wiley & Sons Inc
 Pub. Date: 01 December, 1988
 List Price: $180.00
 Amazon.com Price: $180.00
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