Ground water devlopment and management in devloping countries 25 years of UN actvities 1963 -1988.

Ground water devlopment and management in devloping countries 25 years of UN actvities 1963 -1988. - New York United Nations 1989 - iii , 34p cm.

General Book

X 42 : 8 . 1 (X) . N88<-- N63, M9/UN