Arallgyfeirio ar ffermydd a'r system gynllunio : contract project ymchwil rhif: 173/2000 /
Wales.National Assembly.
Land Use Consultants (Great Britain)
University of the West of England.
Welsh Institute of Rural Studies.
Caerdydd : Cynulliad Cenedlaethol Cymru,
2001.
Land use
New agricultural enterprises
New business enterprises