Bedrock geology of the Bristol quadrangle, Hartford, Litchfield and new Havencounties Connecticut /
Simpson, Howard E. H.
Bedrock geology of the Bristol quadrangle, Hartford, Litchfield and new Havencounties Connecticut / Howard E. Simpson - Denver : U. S. Geological Survey, 1990 - 13 p. : ill. ; 28 cm. - U.S. Geological survey bulletin ; no. 1573 .
86-607922
Geology, Statigraphic--Ordovician
Geology, Stratigraphic--Devonian
Geology, Stratigraphic--Triassic
Bedrock geology of the Bristol quadrangle, Hartford, Litchfield and new Havencounties Connecticut / Howard E. Simpson - Denver : U. S. Geological Survey, 1990 - 13 p. : ill. ; 28 cm. - U.S. Geological survey bulletin ; no. 1573 .
86-607922
Geology, Statigraphic--Ordovician
Geology, Stratigraphic--Devonian
Geology, Stratigraphic--Triassic
