MEI Shi - long , 1991 . Middle and Late Cambrian conodont and trilobite biostratigraphy in Wanxian, Hebei . Unpublished Ph. D thesis of Peking University.武桂春, 2003. 鲁西地区晚寒武世牙形石. 北京大学博士研究生学位论文....an unpublished PhD thesis...
金鸡初啼, 黎明鸟语, 那闪烁着朝晖的树木和草原的景色,这一切他认为无可比拟.Nothing can be compared, he maintains, with the first cock crow, the twittering of birds at dawn, the sight of the rising sun glinting on the trees and pastures.闲看浮云落日, 静听松涛鸟语.Free ...