Biological survey of common land.
Penfold, N.
Nature Conservancy Council (Great Britain)
University College of Wales (Aberystwyth, Wales).Rural Surveys Research Unit.
Aberystwyth : University College of Wales, Rural Surveys Research Unit,
1990.
A survey of the biological characteristics and management of common land.
Produced under contract to the Nature Conservancy Council.
Ecological surveys
Commons