1. Contour map of the bedrock surface of the Broad Brook quadrangle, Connecticut [cartographic material] Yale Public content 1963. 2012-09-24T18:36:40Z. 2013-03-18T22:19:42Z. Cushman, R. V. (Robert Vittum), 1916-. U.S. Dept. of the Interior, Geological Survey. English. Public. Connecticut, Hartford County, and Tolland County.