GEN

x, 405 p. : charts, maps, tables.

Includes#UN map no. 3432: Africa : hydrogeological outline#(Jan. 1988);#UN map no. 2220 rev. 4: Cape Verde#(July 1984);#UN map no. 3115 rev. 2: Nigeria#(Feb. 1985);#UN map no. 1434 rev. 4: Sudan#(Sept. 1986);#UN map no. 2848.1 rev. 1: Togo : geological outline#(Apr. 1987);#UN map no. 3431: Africa : ground-water resources#(May 1988);#UN map no. 2033 rev. 1: Africa : major hydrogeological formations#(May 1988).
Includes bibliographical references.

9211042038