| 21. 
  |  | Title: L'absorption minérale chez les végétaux, (Monographies de physiologie végétale) by R Heller
 ISBN: 2225387206
 Publisher: Masson
 Pub. Date: 1974
 
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| 22. 
  |  | Title: Manuel de statistique biologique (Gauthier-Villars université, 515. Statistique appliquée) by R Heller
 ISBN: 2040033424
 Publisher: Gauthier-Villars
 Pub. Date: 1974
 
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| 23. 
  |  | Title: Gérer le changement by R. Heller
 ISBN: 2842701348
 Publisher: Mango
 Pub. Date: 04 June, 1999
 
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| 24. 
  |  | Title: Computer Representation and Manipulation of Chemical Information by NATO Advanced Study Institute, S.R. Heller, R.J. Feldmann, E. Hyde, W.T. Wipke, W. Todd Wipke, North Atlantic Treaty Organization Scientific Affairs Division, Chemical Notation Association
 ISBN: 0898741424
 Publisher: Krieger Pub Co
 Pub. Date: 01 August, 1981
 List Price: $24.50
 Amazon.com Price: $24.50
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| 25. 
  |  | Title: Physiologie végétale by R. (René) Heller, R. (Robert) Esnault, C. (Claude) Lanec
 ISBN: 2100039911
 Publisher: Dunod
 Pub. Date: 14 October, 1998
 
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| 26. 
  |  | Title: Prendre des décisions by R. Heller
 ISBN: 284270133X
 Publisher: Mango
 Pub. Date: 04 June, 1999
 
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| 27. 
  |  | Title: New Trends in Biology Teaching/Tendances Nouvelles De L'Enseignement De LA Biologie, Vol 5 (Teaching of Basic Sciences) by R Heller
 ISBN: 9231024477
 Publisher: Bernan Associates
 Pub. Date: 01 December, 1987
 List Price: $20.00
 Amazon.com Price: $20.00
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| 28. 
  |  | Title: Abrégé de physiologie végétale by R Heller
 ISBN: 2225466629
 Publisher: Masson
 Pub. Date: 1977
 
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| 29. 
  |  | Title: Savoir déléguer by R. Heller
 ISBN: 2842701291
 Publisher: Mango
 Pub. Date: 14 April, 1999
 
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| 30. 
  |  | Title: The Annual of the American Institute of Graphics Arts (Annual of the American Institute of Graphic Arts) by David R. Brown, Moira Cullen, Steven Heller, Ellen Lupton, Rick Poynor
 ISBN: 0823063917
 Publisher: Watson-Guptill Publications
 Pub. Date: 01 October, 1995
 List Price: $59.95
 Amazon.com Price: $59.95
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