Zinc and Lead Reserves of Southwest Wisconsin: The Undrilled Lead Digs of Southwest Wisconsin Open-file report; contains unpublished data that has not yet been peer-reviewed. Driftless Area Metallic Minerals Rocks and Minerals Data and Resources WOFR1991-05 Zinc and Lead Reserves of Southwest Wisconsin & The Undrilled Lead Digs of Southwest Wisconsin Broughton, W.A.; 1991 Report: 11 p. Download Related Collections Open-File Report View Open-File Report