1. Nature Management by Grazing and Cutting;Bakker,1989
2. The acidifying effect of ammonia volatized from farm-manure on forest soils;Berendse;Ecol. Bull.,1988
3. The agricultural environment in the European Community;De Wit;Ecol. Bull.,1988
4. Effects of use and mineral supply on the botanical composition and yield of old grassland on heavy-clay soil;Elberse;Nether. J. Agric. Sci.,1983
5. The changing extent and conservation interest of lowland grassland;Fuller;Biol. Conserv.,1987