TY - RPRT TI - Preliminary geologic map of Precambrian rocks in part of northern Wisconsin AU - P. K. Sims AU - W.F. Cannon AU - M.G. Mudrey PY - 1978 DO - 10.3133/ofr78318 UR - https://pubs.usgs.gov/publication/ofr78318 ID - ofr78318 ER -