1. Water pollution in remote recreational areas;Barton;J. Soil Wat. Conserv.,1969
2. Sailing on reservoirs and its effects on water birds;Batten;Biol. Conserv.,1977
3. Some effects of walking and skiing on vegetation at Cairngorm;Bayfield,1971
4. Creation of wash by pleasure craft;British Transport Docks Board;Southall, British Transport Docks Board (Report no. R 236),1972