TY - RPRT TI - Differentiation of volcanic ash-fall and water-borne detrital layers in the Eocene Senakin coal bed, Tanjung Formation, Indonesia AU - Leslie F. Ruppert AU - T.A. Moore PY - 1993 DO - 10.1016/0146-6380(93)90041-9 UR - https://pubs.usgs.gov/publication/70018391 ID - 70018391 ER -