D. A. Roberts

Waste management and disposal in Wales: A data problem

P. Wathern, D. A. Roberts, I. Brown, 1988 .

Ecological evaluation techniques

P. Wathern, D. A. Roberts, I. Brown, 1986 .

Upland policy and archaeological resources in North Wales

P. Wathern, D. A. Roberts, I. Brown, 1987 .

Monitoring sand dune erosion on the Clwyd Coast, North Wales.

P. Wathern, D. A. Roberts, I. Brown, 1985 .

Recent upland land use change and agricultural policy in Clwyd, North Wales

P. Wathern, D. A. Roberts, I. Brown, 1988 .

The EEC less favoured areas directive: Implementation and impact on upland land use in the UK☆

P. Wathern, D. A. Roberts, I. Brown, 1986 .