Bonar, S. A., S. Contreras-Balderas, and A. C. Iles. 2009. An Introduction to Standardized Sampling. In S. A. Bonar, W. A. Hubert, and D. W. Willis, Editors. Standard Methods for Sampling North American Freshwater Fishes. American Fisheries Society, Bethesda, Maryland. 20 pp.
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