ANON. 1981. The Economy of Rural Communities in the National Parks of England and Wales. Tourism and Recreation Unit: Report No. 47, University of Edinburgh.
Attwood, E. A. and Evans, H. G.
1961. The Economics of Hilt Farming. University of Wales Press.
Barker, J. D., Coutts, C. N. and Jones, T.
1983. Group Breeding Schemes. Anim. Br. Res. Org. Report, 17–22.
Blaxter, K. L., Kay, R. N. B., Sharman, G. A. M.
Cunningham, J. M. M. and Hamilton, W. J.
1974. Farming the red deer. DAFS, HMSO, Edinburgh.
Buckwell, A. 1985. Paper presented at the Conference of the British Association of Nature Conservationists, May 1985.
Cunningham., J. M. M., Groves, C. R. and Clark, J.
1985. The Resource Base — Agriculture. A paper presented at the Royal Society of Edinburgh Symposium — Scottish Food and Drink, February 1985.
1978. Increasing output in sheep farming. J. Roy. agric. Soc. Eng.
1984. Trends in agricultural land use: the hills and uplands. A paper presented at ITE Symposium No. 13, March 1984.
Ellison, W. and Boyd, D. A.
1952. Possibilities of marginal land reclamation — some results of a survey in England and Wales. J. Roy. agric. Soc. Eng.
Ellison, W., Boyd, D. A. and Church, B. M.
1955. The progress of improvement on upland and hill farms in England and Wales. J. Roy. agric. Soc. Eng.
Ernle, Lord. 1961. English Farming Past and Present. 6th edition, Heinemann Education Books Ltd, London.
Hamilton, W. J., Milne, J. A. and Maxwell, T. J. 1983. Progress in research on red deer farming. Hill Fmg Res. Org. Biennial Report, 1982-1983.
Handley, J. E.
1953. Scottish Farming in the Eighteenth Century. Faber and Faber Ltd, London.
HIDB. 1967. First report. HIDB, Inverness.
HMSO. 1944. Report of committee on Hill Sheep Farming (Scotland) Cmnd 644.
HMSO. 1965. Annual Review and Determination of Guarantees, 1965. Cmnd 2621, London.
HMSO. 1985. Annual Review of Agriculture, 1985. Cmnd 9423, London.
Hughes, R. Elfyn, Dale, J., Mountford, M. D. and Ellis-Williams, I.
1975. Studies in sheep populations and environment in the mountains of North-West Wales. J. appl. Ecol.
Hunter, R. F.
1964. Home range behaviour in hill sheep. In Grazing in Terrestrial and Marine Environments (ed. Crisp, D. J.), pp. 155–171. Symp. Br. Ecol. Soc. 1962. Blackwells.
Jones, Ll. Irowerth. 1967. Studies on hill land in Wales. Technical Bulletin No. 2. Welsh Plant Breeding Station.
Mutch, W. E. S. and Hutchison, A. R.
1980. The interaction of forestry and farming. Dept For. and Nat. Res., University of Edinburgh.
Rae, A. L.
1974. the development of group breeding schemes: some theoretical aspects. Sheep Farming Annual, Massey College, New Zealand, 121–127.
Smout, T. C.
1969. A. History of the Scottish People, 1560-1830. Collins, London.