. . . . "Bedrock geology of the Penn Yan and Keuka Park Quadrangles New York"@en . "Lithologic descriptions and geologic maps of the Middle and Upper Devonian rocks in a part of the Finger Lakes region of New York State."@en . . . . . . . . . . "Contributions to general geology"@en . "Bedrock geology of the Penn Yan and Keuka Park quadrangles, New York : lithologic descriptions and geologic maps of the Middle and Upper Devonian rocks in a part of the Finger Lakes region of New York State" . . "Geology New York (State) PennYan Quadrangle." . . . . "Geology New York (State) Keuka Park Quadrangle." . . "Geological Survey (U.S.)," . .