Global international waters assessment :
Global international waters assessment : regional assessment 43 : Lake Chad basin. /
United Nations Environmental Programme.
- Sweden : University of Kalmar, c2004.
- 129 p. : ill. (col.) : 28 cm.
- GIWA Regional assessment 43 .
United Nations Environment Programme Global International Waters Assessment
Environmental protection--International cooperation
Water supply --International cooperation
Eutrophication.
Marine pollution
Lake Chad basin
GC1085 / .L35 2004
United Nations Environment Programme Global International Waters Assessment
Environmental protection--International cooperation
Water supply --International cooperation
Eutrophication.
Marine pollution
Lake Chad basin
GC1085 / .L35 2004