APA (7th ed.) Citation

Environmental Hydrology Corporation. (1980). Hydro-index. Environmental Hydrology Corp..

Chicago Style (17th ed.) Citation

Environmental Hydrology Corporation. Hydro-index. Minneapolis, Minn.: Environmental Hydrology Corp., 1980.

MLA (8th ed.) Citation

Environmental Hydrology Corporation. Hydro-index. Environmental Hydrology Corp., 1980.

Warning: These citations may not always be 100% accurate.