| Referens | Knutsen, C.J. and D.L. Ward, 1999, Biological characteristics of northern pikeminnow in the lower Columbia and Snake Rivers before and after sustained exploitation.. Trans. Am. Fish. Soc. 128(6):1008-1019. |
| Ref. | 34226 Knutsen, C.J. and D.L. Ward, 1999 |
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| Named Used as Valid | Ptychocheilus oregonensis |
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