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Brinkhurst, R.O. (1964). Studies on the North American aquatic Oligochaeta. I. Naididae and Opistocytidae. Proceedings of the Academy of Natural Sciences of Philadelphia. 116:195-230.
Brinkhurst, R.O. (1964). Studies on the North American aquatic Oligochaeta. I. Naididae and Opistocytidae. Proceedings of the Academy of Natural Sciences of Philadelphia. 116:195-230.
