APA (7th ed.) Citation

(1977). Ground-water levels in the United States, 1972-74: North-central states. U.S. G.P.O..

Chicago Style (17th ed.) Citation

Ground-water Levels in the United States, 1972-74: North-central States. Washington, D.C.: U.S. G.P.O., 1977.

MLA (9th ed.) Citation

Ground-water Levels in the United States, 1972-74: North-central States. U.S. G.P.O., 1977.