Environmental economic evaluation of the mangrove ecosystem in the Indus delta (second draft) : proposal for funding 1992
The shared need for flowing water : people and wildlife on Nebraska's Platte River, USA 1992 Strom, Kenneth |
Documentation, conventions/soft law concerning species, ecosystems and the conservation of biological diversity = concernant la conservation des espèces, des écosystèmes et de la diversité biologique 1990