Colton, R. B., & Cushman, R. V. (1963). Contour map of the bedrock surface of the Manchester Quadrangle, Connecticut. U.S. Geological Survey.
Chicago Style (17th ed.) CitationColton, Roger B., and R. V. Cushman. Contour Map of the Bedrock Surface of the Manchester Quadrangle, Connecticut. Washington: U.S. Geological Survey, 1963.
MLA (9th ed.) CitationColton, Roger B., and R. V. Cushman. Contour Map of the Bedrock Surface of the Manchester Quadrangle, Connecticut. U.S. Geological Survey, 1963.
Warning: These citations may not always be 100% accurate.