Bobbink R, Hettelingh JP.
Review and revision of empirical critical loads and dose-response relationships. Coordination Centre for Effects, National Institute for Public Health and the Environment (RIVM); 2011. Available from:
www.rivm.nl/cce and Service EH.
River Habitat Quality. Belfast: Environment and Heritage Service; 1998.
and Service EH.
River Quality in Northern Ireland. Department of the Environment for Northern Ireland.; 1995.
and Service EH.
River Quality in Northern Ireland 1995. Department of the Environment for Northern Ireland; 1998.