1. American Public Health Association. 1971. Standard methods for the examination of water and wastewater. 13th ed A. P. H. A., New York. 874 p.
2. Boyd, Claude E. 1971 a. The limnological role of aquatic macrophytes and their relationship to reservoir management. Reservoir Fisheries and Limnol., Spec. Pub. No. 8: 153–166.
3. Boyd, Claude E. 1971 b. Phosphorus dynamics in ponds, p. 418–426. In Proceedings of 25th annual conference of the southeast association of game and fish commissioners.
4. Boyd, Claude E. 1972. Sources of CO2 for nuisance blooms of algae. Weed Sci. 20 (5): 492–497.
5. N.Y. State Mus. Sci. Serv. Bull.;Denton W. Crocker,1957