Water resources research catalog. U.S. departamet of the interior.
Water resources scinetific information center.
- Anual.
1973 v. (2) ; 1974 v. (9) ; 1976 v. (11).
Geología.
1973 v. (2) ; 1974 v. (9) ; 1976 v. (11).
Geología.
