TY - RPRT TI - Depositional environments and tectonic controls on the coal-bearing Lower to Middle Jurassic Yan'an Formation, southern Ordos Basin, China AU - E. A. Johnson AU - Liu Shu AU - Zhang Yonglin PY - 1989 DO - 10.1130/0091-7613(1989)017<1123:deatco>2.3.co;2 UR - https://pubs.usgs.gov/publication/70015305 ID - 70015305 ER -