Roy Walter Associates Ltd & Great Britain. Department of Environment. (1991). Environmental effects of surface mineral workings: Report to Department of the Environment. HMSO.
Chicago Style (17th ed.) CitationRoy Walter Associates Ltd and Great Britain. Department of Environment. Environmental Effects of Surface Mineral Workings: Report to Department of the Environment. London: HMSO, 1991.
MLA (9th ed.) CitationRoy Walter Associates Ltd and Great Britain. Department of Environment. Environmental Effects of Surface Mineral Workings: Report to Department of the Environment. HMSO, 1991.
Warning: These citations may not always be 100% accurate.