TY - GEN A2 - Cannon, William F. AU - Geological Survey (U.S.) CN - I 19.91:I-2566 CY - Denver, CO CY - Reston, VA LA - English PB - [For sale by Information Services, The Survey] PP - Denver, CO PP - Reston, VA PY - 1996 SN - 0607862408 SN - 9780607862409 TI - Bedrock geologic map of the Ashland and the northern part of the Ironwood 30ʹ x 60ʹ quadrangles, Wisconsin and Michigan ER -