Countryside survey 1990 : main report /
Barr, Colin,1950-
Institute of Freshwater Ecology (Great Britain).
Institute of Terrestrial Ecology.
Great Britain.Department of the Environment.
[London] : Department of the Environment,
1993.
A report prepared for the Department of the Environment by the Institute of Terrestrial Ecology and the Institute of Freshwater Ecology.
Includes bibliographical references.