Royal Scottish Geographical Society, Thomas, M. F., & Coppock, J. T. (1980). Land assessment in Scotland: Proceedings of the Royal Scottish Geographical Society symposium held in the University of Edinburgh on 25 May 1979. Aberdeen University Press.

Royal Scottish Geographical Society, Michael F. Thomas, and J. T. Coppock. Land Assessment in Scotland: Proceedings of the Royal Scottish Geographical Society Symposium Held in the University of Edinburgh on 25 May 1979. Aberdeen: Aberdeen University Press, 1980.

Royal Scottish Geographical Society, et al. Land Assessment in Scotland: Proceedings of the Royal Scottish Geographical Society Symposium Held in the University of Edinburgh on 25 May 1979. Aberdeen University Press, 1980.