The causes, nature and rate of soil degradation in the Northernmost States of Nigeria and an assessment of the role of fertiliser in counteracting the process of degradation 1989 Mortimore, Michael |
Planning study for an industrial estate for industries with water intensive and polluting activities in Mauritius 1989 St. Michel, Leo A. | Dangel, Robert |
Proceedings of the Inter-American Conference on Conservation of Renewable Natural Resources, Denver, Colorado, September 7-20, 1948 1949
Status of forest remnants in the Cordillera de la Costa and adjacent areas of southwestern Ecuador 1992 Parker, Theodore A. | Carr, John L. |
The world environment 1972 -1982 : a report 1982 Holdgate, Martin W. | Kassas, Mohammed | White, Gilbert F. |
Plan de manejo del parque nacional Torres del Paine 1986 Alvarez, Marcelo | Araya, Pedro | Cunazza, Claudio | Gómez, Santiago | Gunckel, Gerardo |