Milling of Kyanite Rock from near Powell, Wisconsin Open-file report; contains unpublished data that has not yet been peer-reviewed. Nonmetallic Minerals Rocks and Minerals Data and Resources WOFR1939-01 Milling of Kyanite Rock from Near Powell, Wisconsin Bean, E.F.; 1939 Report: 4 p. Download Related Collections Open-File Report View Open-File Report