Assemblée générale de Helsinki =
Subtitle: General Assembly of Helsinki : 25-7 - 6-8 1960.
Contributors: International Association of Scientific Hydrology. Commission of Subterranean Waters.
Series: Publication / Associationinternationale d'hydrologie scientifique -- no.52
Publisher: Association internationale d'hydrologie scientifique
Published: 1960
Place of publication: Gentbrugge
Language: mul