Schwindt, A.R., M.L. Kent, L.K. Ackerman, S.L. Massey Simonich, D.H. Landers, T. Blett, and C.B. Schreck. 2009. Reproductive abnormalities in trout from western U.S. National parks. Transactions of the American Fisheries Society. 138:522-531.
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