References
- American Public Health Association. 1960. Standard Methods for the Examination of Water and Wastewater. 11th Ed. 626 pp. New York, N. Y.
- Pennak, R. W. 1945 a. Some aspects of the regional limnology of northern Colorado. – Univ. Colo. Stud., Ser. D, 2, 263–293.
- Pennak, R. W. 1949. Annual limnological cycles in some Colorado reservoir lakes. — Ecol. Monogr., 19, 233–267.
- Pennak, R. W. 1953. Fresh-Water Invertebrates of the United States. 1st ed. 769 pp. New York, N. Y.
- Ward, H. B., and Whipple, G. C. 1959. Fresh-Water Biology. 2nd ed. 1248 pp. New York, N.Y.