ALGAL-SPONGE REEFS IN LOWER ORDOVICIAN FENGXIANG FORMATION, YICHANG, HUBEI
Zhu Zhongde, Jiang Yanwen, Liu Bingli, Hu Mingyi, Xiao Chuantao
Oil & Gas Geology . 1995, (4): 319 -323 .  DOI: 10.11743/ogg19950404