APA (7th ed.) Citation

Balk, R. (1956). Geologic map of the Millers Falls quadrangle, Massachusetts: Bedrock geology. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Balk, Robert. Geologic Map of the Millers Falls Quadrangle, Massachusetts: Bedrock Geology. Washington: U.S. Geological Survey, 1956.

MLA (9th ed.) Citation

Balk, Robert. Geologic Map of the Millers Falls Quadrangle, Massachusetts: Bedrock Geology. U.S. Geological Survey, 1956.

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