P. D. Jenssen (Jenssen, P. D.)

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  Constructed Wetlands for Wastewater Treatment in Cold Climate Areas
  by P. D. Jenssen, U. Mander
  Hardcover, Computational Mechanics, ISBN 185312883X (1-85312-883-X)
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  Constructed Wetlands for Wastewater Treatment in Cold Climate Areas
  by U. Mander, P. D. Jenssen
  Hardcover, Computational Mechanics, ISBN 1853126519 (1-85312-651-9)
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  Natural Wetlands for Wastewater Treatment in Cold Climates
  by U. Mander, P. D. Jenssen
  Hardcover, Computational Mechanics, ISBN 1853128597 (1-85312-859-7)