TY - GEN AU - Jordan,C.E. AU - Sullivan,G.V. AU - Davis,B.E. ED - United States. TI - Pneumatic concentration of mica T2 - Report of investigations PY - 1980/// CY - Washington PB - U.S. Dept. of the Interior, Bureau of Mines KW - Ore-dressing KW - Mica KW - Air classifiers ER -