| Citation | Parker, R.M., M.P. Zimmerman and D.L. Ward, 1995, Variability in biological characteristics of northern squawfish in the lower Columbia and Snake Rivers.. Trans. Am. Fish. Soc. 124(3):335-346. |
| Ref. | 32557 Parker, R.M., M.P. Zimmerman and D.L. Ward, 1995 |
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| Named Used as Valid | Ptychocheilus oregonensis |
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