Carte hydrogéologique internationale de l'Afrique = International hydrogeological map of Africa.
African Association of Cartography.
Organization of African Unity.
International Hydrogeological Mapping Program of Africa.
Alger : Institut national de cartographie,
[1988-93]
Title and legend in French and English.
At head of title, in French and English: Organization of African Unity. African Association of Cartography. International Hydrogeological Mapping Program of Africa.
Sheets may include sheet location diagram, maps in margin, and text.
Sheet 4 is the legend.
Accompanied by: Explanatory notes.
Hydrogeology