Bedrock geology of the Bristol Quadrangle, Hartford, Litchfield, and New Haven counties, Connecticut /

by Simpson, Howard E.
Published 1989

Bedrock geology of the Bristol Quadrangle, Hartford, Litchfield, and New Haven counties, Connecticut /

by Simpson, Howard E.
Published 1990

Geology and ground-water resources of North Dakota /

by Simpson, Howard E.
Published 1929

Map showing landslides in the Golden quadrangle, Jefferson County, Colorado /

by Simpson, Howard E.
Published 1973

Map showing areas of potential rockfalls in the Golden quadrangle, Jefferson County, Colorado /

by Simpson, Howard E.
Published 1973

Surficial geologic map of the Durham quadrangle, Middlesex and New Haven Counties, Connecticut /

by Simpson, Howard E.
Published 1968

Geologic map of the New Britain quadrangle, Connecticut : surficial geology /

by Simpson, Howard E.
Published 1959

Geologic map of the Bristol quadrangle, Connecticut : surficial geology /

by Simpson, Howard E.
Published 1961

Bedrock geologic map of the New Britain quadrangle, Connecticut /

by Simpson, Howard E.
Published 1966

Bedrock geology of the Bristol Quadrangle, Hartford, Litchfield, and New Haven counties, Connecticut /

by Simpson, Howard E.
Published 1990

Methods of reducing the flow of artesian wells /

by Simpson, Howard E. (Howard Edwin), 1874-1938
Published 1932

Artesian water conditions in North Dakota /

by Simpson, Howard E. (Howard Edwin), 1874-1938
Published 1923

The conservation of artesian water /

by Simpson, Howard E. (Howard Edwin), 1874-1938
Published 1926

A method of water prospecting /

by Simpson, Howard E. (Howard Edwin), 1874-1938
Published 1927

The ground waters of North Dakota /

by Simpson, Howard E. (Howard Edwin), 1874-1938
Published 1932

Change in ground water levels in North Dakota /

by Simpson, Howard E. (Howard Edwin), 1874-1938
Published 1937

Geology and ground-water resources of North Dakota /

by Simpson, Howard E. (Howard Edwin), 1874-1938, Riffenburg, Harry B. (Harry Buchholz), 1891-
Published 1929