Ammonia determination based on indophenol formation with sodium salicylate von Verdouw, H., Van Echteld, C.J.A., Dekkers, E.M.J.

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Sources of Organic Carbon in the Littoral of Lake Gooimeer as Indicated by Stable Carbon Isotope and Carbohydrate Compositions von Boschker, H. T. S., Dekkers, E. M. J., Pel, R., Th. E. Cappenberg

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Nitrogen cycle of Lake Vechten: concentration patterns and internal mass-balance von Verdouw, H, Dekkers, E.M.J

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