1. Christensen, V.G., 2001, Characterization of surface-water quality based on real-time monitoring and regression analysis, Quivira National Wildlife Refuge, south-central Kansas, December 1998 through June 2001: U.S. Geological Survey Water-Resources Investigations Report 2001–4248, 28 p. [Also available at https://doi.org/10.3133/wri014248.]
2. Christensen, V.G., Graham, J.L., Milligan, C.R., Pope, L.M., and Ziegler, A.C., 2006, Water quality and relation to taste-and-odor compounds in the North Fork Ninnescah River and Cheney Reservoir, south-central Kansas, 1997–2003: U.S. Geological Survey Scientific Investigations Report 2006–5095, 43 p. [Also available at https://doi.org/10.3133/sir20065095.]
3. Christensen, V.G., Ziegler, A.C., Rasmussen, P.P., and Jian, X., 2003, Continuous real-time water-quality monitoring of Kansas streams, in Proceedings of 2003 Spring Specialty Conference on Agricultural Hydrology and Water Quality, May 12–14, 2003, Kansas City, Missouri: Middleburg, Va., American Water Resources Association, AWRA Technical Publication Series no. TPS–03–1, compact disc. [Also available at https://nrtwq.usgs.gov/ks/methods/christensen2003.]
4. Cohen, A.C., Jr., 1950, Estimating the mean and variance of normal populations from singly truncated and doubly truncated samples: Annals of Mathematical Statistics, v. 21, no. 4, p. 557–569. [Also available at https://doi.org/10.1214/aoms/1177729751.]
5. Cohn, T.A., Delong, L.L., Gilroy, E.J., Hirsch, R.M., and Wells, D.K., 1989, Estimating constituent loads: Water Resources Research, v. 25, no. 5, p. 937–942. [Also available at https://doi.org/10.1029/WR025i005p00937.]