Geochemistry of the rare earth elements of coals from the Longtan Formation in Chongqing and its geological implication
GUO Jiangfeng,YAO Duoxi,CHEN Jian,CHEN Ping
Earth Science Frontiers . 2016, (3): 51 -58 .  DOI: 10.13745/j.esf.2016.03.007