APA (7th ed.) Citation

Blackwell, C. D. (1985). National Water Data Exchange (NAWDEX): Explanations of codes used in the master water data index. U.S. Dept. of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Blackwell, Cassandra D. National Water Data Exchange (NAWDEX): Explanations of Codes Used in the Master Water Data Index. [Reston, Va.]: U.S. Dept. of the Interior, Geological Survey, 1985.

MLA (9th ed.) Citation

Blackwell, Cassandra D. National Water Data Exchange (NAWDEX): Explanations of Codes Used in the Master Water Data Index. U.S. Dept. of the Interior, Geological Survey, 1985.