1. 4) Haith, D. A. (1976) ”Land use and water quality in New York Rivers”, Journal of the Environmental Engineering Division, ASCE, Vol. 103, pp.1-12.
2. 6) Hobbie, J. E. and G. E. Likens (1973) ”Output of phosphorus, dissolved organic carbon, and fine particulate carbon from Hubbard Brook watersheds”, Limnology and Oceanography, Vol. 18, No. 5, pp.734-742.
3. 7) Hunsaker, C. T., D. A. Levine, S. P. Timmins, B. L. Jackson and R. V. O’Neill (1992) ”Landscape characterization for assessing regional water quality”, Ecological Indicators Volume 2, Proceedings of International Symposium on Ecological Indicators, pp.997-1006.
4. 11) Omernik, J. M. (1976) The influence of land use on stream nutrient levels, Oregon: U.S. Environmental Protection Agency.
5. 12) Osborne, L. L. and M. J. Wiley (1988) ”Empirical relationships between land use/cover and stream water quality in an agricultural watershed”, Journal of Environmental Management, Vol. 26, pp.9-27.