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General assembly of Bern : commission of snow and ice: reports and discussions= Assemblée Générale de Berne : rapports et discussions
(Association Internationale D'Hydrologie Scientifique, 1968)
Water : a looming crisis? : proceedings
(UNESCO, 1998)
Ecohydrological processes in small basins : proceedings
(UNESCO, 1997)
Ninth biennial conference on ground water
(University of California, 1973)