1961. 2011-05-06T17:33:20Z. 2012-02-14T23:32:38Z. Simpson, Howard E. The Survey. English. Public. Connecticut, Hartford County, Litchfield County, and New Haven County.
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1968. 2012-02-20T18:24:43Z. 2012-03-06T15:51:51Z. Simpson, Howard E. U.S. Geological Survey. English. Public. Connecticut, Middlesex County, and New Haven County.