APA (7th ed.) Citation

Post, E. V. H. (1967). Map of southeastern Maine showing heavy metals in stream sediments. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Post, Edwin Van Horn. Map of Southeastern Maine Showing Heavy Metals in Stream Sediments. Washington, D.C.: U.S. Geological Survey, 1967.

MLA (9th ed.) Citation

Post, Edwin Van Horn. Map of Southeastern Maine Showing Heavy Metals in Stream Sediments. U.S. Geological Survey, 1967.