The learning society and the water-environment : La societe cognitive et les problemes de l'eau : proceedings of the International Symposium, Paris 2-4 June 1999 - International Symposium: The Learning Society and the Water-Environment; European Commission. (Υπηρεσία Επισήμων Εκδόσεων των Ευρωπαϊκών Κοινοτήτων, 2000)