1. Otter survey of Wales 1984–1985;Andrews,1986
2. Monitoring otters in Shetland;Conroy,1985
3. Conroy, J. W. H. & French, D. D. (in press). The use of spraints to monitor populations of otters (Lutra lutra). Symp. Zool. Soc. Lond., 58.
4. A radio-tracking survey of otters Lutra lutra on a Perthshire river system;Green;Lutra,1984
5. The value of otter Lutra lutra surveying using spraints: an analysis of its successes and problems in Britain;Jefferies;J. Otter Trust,1986