by New Jersey Geological Survey, 1863-1915

1898

by Tennessee. State Geological Survey, Albert Homer Purdue, Ernest Francis Burchard, George Hall Ashley, John Albert Switzer

1911

by Geological Survey of Alabama

1895

by Geological Survey (U.S.)

1989

by Geological Society of London. Library

1895

by New Jersey Geological Survey

1898

by Florida Geological Survey

1929

by Tennessee. State Geological Survey

1913

by Geological Society of London. Library

1912

by Geological Survey (U.S.)

1984

by Geological Society of London. Library

1904

by Tennessee. State Geological Survey

1913