@inbook {602, title = {Critical Loads: Concepts and Applications}, booktitle = {ITE Symposium}, volume = {28}, year = {1993}, pages = {103-108}, chapter = {Critical loads and surface waters: evaluation of the steady-state water chemistry model}, author = {Harriman, R. and Christie, A.E.G. and Hornung, M. (Eds) and Skeffington, R.A. (Eds)} }