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Brinkhurst, R.O. (1965). Studies on the North American aquatic Oligochaeta II: Tubificidae. Proceedings of the Academy of Natural Sciences of Philadelphia. 117 (4):117-172.
Brinkhurst, R.O. (1965). Studies on the North American aquatic Oligochaeta II: Tubificidae. Proceedings of the Academy of Natural Sciences of Philadelphia. 117 (4):117-172.