International legend for hydrogeological maps =
Subtitle: Légende internationale des cartes hydrogéologiques = Leyenda internacional para mapas hidrogeológicos = Mezhdunarodnaya legenda k gidrogeologicheskim kartam
By: UNESCO.
Contributors: Unesco.
Publisher: Unesco
Published: 1970
Place of publication: Paris
Language: mul
Number of pages: 101
Subjects: Hydrology.; Hydrological mapping.
Other titles: Légende internationale des cartes hydrogéologiques.; Leyenda internacional para mapas hidrogeológicos.; Mezhdunarodnaya legenda k gidrogeologicheskim kartam.
Notes: Parallel English, French, Spanish and Russian text.