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Yearbook of the Federal Republic of Germany : calendar year 1969

Alemania. Federal and State Hydrological and Metereological Authorities; PHI (Federal Institute of Hydrology and the German Research Association, 1972)

Yearbook of the Federal Republic of Germany : calendar year 1970

Alemania. Federal and State Hydrological and Metereological Authorities; PHI (Federal Institute of Hydrology and the German Research Association, 1970)

Aquifer contamination and protection

PHI; UNESCO; Jackson, Roger ed. (UNESCO, 1980)

Yearbook of the Federal Republic of Germany : calendar year 1987

Alemania. Federal and State Hydrological and Metereological Authorities; PHI (Federal Institute of Hydrology and the German Research Association, 1990)

Lecture notes of the UNESCONORAD Third Regional Training Course for Hydrology Technicians : Kenya, 1977

PHI; UNESCO; Gray, K. D. ed; Regional Training Course for Hydrology Technicians (3o. : 1977 : Nairobi) (UNESCO, 1977)

Water : a looming crisis? : proceedings

PHI; Zebidi, H., ed.; International Conference on World Water Resources at the Begining of the 21st Century (3-6 June 1998 : Paris) (UNESCO, 1998)

Ecohydrological processes in small basins : proceedings

PHI; Conference of the European Network of Experimental and Representative Basins (ERB) (6th : 24-26 September 1996 : Strasbourg, France) (UNESCO, 1997)

Yearbook of the Federal Republic of Germany : calendar year 1990

Alemania. Federal and State Hydrological and Metereological Authorities; PHI (Federal Institute of Hydrology and the German Research Association, 1993)

Yearbook of the Federal Republic of Germany : calendar year 1977

Alemania. Federal and State Hydrological and Metereological Authorities; PHI (Federal Institute of Hydrology and the German Research Association, 1982)

Yearbook of the Federal Republic of Germany : calendar year 1973

Alemania. Federal and State Hydrological and Metereological Authorities; PHI (Federal Institute of Hydrology and the German Research Association, 1976)