in Pang Qiqing Zhang Lixian & Wang Qiang, In Tianjin Dizhi Kuangchan Yanjiusuo [Tianjin Institute of Geology and Mineral Resources. ] Huabei diqu gu shengwu tuce. 3. Weiti gu shengwu fence [Palaeontological atlas of north China. 3. Micropalaeontological v
