TY - RPRT TI - Distribution of scandium between coexisting biotite and hornblende in igneous rocks AU - Robert I. Tilling AU - L. Paul Greenland AU - D. Gottfried PY - 1969 DO - 10.1130/0016-7606(1969)80[651:dosbcb]2.0.co;2 UR - https://pubs.usgs.gov/publication/70211006 ID - 70211006 ER -