Kunshan Drillcore 3 in Yangcheng Lake, Jiangsu Province (120.993, 31.394, Upper Ordovician)
Ge, M.Y., 1984. The Upper Ordovician graptolites from Kunshan, Jiangsu. Bulletin of the Nanjing Institute of Geology and Palaeontology, Academia Sinica 9, 237–264 (inChinese).