1 Table of Contents: “... Nations data bases on desertification -- The implementation of soil conservation programmes -- Evolution...”

2 “... to changing environmental conditions. Researchers at Oak Ridge National Laboratory together with other Federal...”

3 “..., will be found only as remnants in national parks and other protected areas. Yet where they continue to exist...”

4 “... National de la Recherche Scientifique (C.N .R.S.)...”