Media type: E-Article Title: Opening Speech Contributor: Baldinger, Friedrich; Tschudi, Hans-Peter Published: Springer Science and Business Media LLC, 1969 Published in: Schweizerische Zeitschrift für Hydrologie, 31 (1969) 2, Seite 205-207 Language: English DOI: 10.1007/bf02543652 ISSN: 0036-7842; 1420-9055 Keywords: Water Science and Technology ; Ecology ; Aquatic Science ; Ecology, Evolution, Behavior and Systematics ; General Medicine Origination: Footnote: