1. N. G. Aumen, T. J. Grizzard, and R. H. Hawkins , 1989 . Task Force Final Report. Water Quality Monitoring on the Bull Run Watershed, Oregon . City of Portland, Oregon, Bureau of Water Works. 108 pp.
2. P. D. Bakke , 1993 . The Spatial and Temporal Variability of Nitrate in Stream of the Bull Run Watershed, Oregon . Unpublished M.S. Thesis , Oregon State University, Corvallis, Oregon, 230 pp.
3. River Loads Underestimated by Rating Curves
4. B. F. Gall , 1986 . A Multivariate Comparison of the Physical and Chemical Characteristics of Streams Draining Three Adjacent Watersheds in Northwestern Washington . Unpublished MS. Thesis , Western Washington University, Bellingham, Washington, 281 pp.
5. G. L. Green , 1983 . Soil Survey of Multnomah County, Oregon . Soil Conservation Service, Portland, Oregon, 255 pp.