TY - GEN A2 - Harrison, Richard W. AU - Geological Survey (U.S.) CN - I 19.91:I-2533 CY - Reston, VA CY - Denver, CO LA - English PB - [The Survey, For sale by Map Distribution] PP - Reston, VA PP - Denver, CO PY - 1997 SN - 9780607885651 SN - 0607885653 TI - Bedrock geologic map of the St. Louis 30ʹ x 60ʹ quadrangle, Missouri and Illinois ER -