Cooper, A., McCann, T., Great Britain. Dept. of the Environment for Northern Ireland. Environment Service, & University of Ulster. Dept. of Environmental Studies. (1994). The botanical composition of grassland land cover types in Northern Ireland: Contract report to Environment Service, DOE (NI). Department of Environmental Studies, University of Ulster.

Cooper, Alan, et al. The Botanical Composition of Grassland Land Cover Types in Northern Ireland: Contract Report to Environment Service, DOE (NI). Department of Environmental Studies, University of Ulster, 1994.