Berry W B N. 1960. Graptolite Fauna of the Marathon Region, West Texas. University of Texas Publication, 6005:179.
[11]
Bulman O M B. 1941. Some dichograptids of the tremadocian and Lower Ordovician. Annals and Magazine of Natural History, 11(7): 100~121.
[12]
Bulman O M B. 1950. Graptolites from the Dictyonema Shales of Quebec. Quarterly Journal of the Geological Society of London,106: 63~99.
[13]
Bulman O M B. 1954. The Graptolite Fauna of the Dictyonema Shales of the Oslo Region. Norsk Geologisk Tidsskrift, 33:1~40.
[14]
Chen Xu. 1985. Earliest Ordovician Graptolites from Western Zhejiang, China and Their Faunal Distribution. Journal of Paleontology, 59(3) :495~510.
[15]
Cooper R A, Stewart I. 1979. The Tremadoc Graptolite Sequence of Lancefield, Victoria. Palaeontology, 22: 767 ~ 797.
[16]
Cooper R A, Maletz J, Wang Haifeng, et al. 1998. Taxonomy and Evolution of Earliest Ordovician Graptoloids. Norsk Geologisk Tidsskrift, 78: 3~32.
[17]
Cooper R A. 1999. Ecostratigraphy, zonation and global correlation of earliest Ordovician planktic graptolites. Lethaia, 32: 1 ~ 16.
[18]
Erdtmann B D, Comeau D J. 1980. A New Anisograptus Faunule from the Goodwin Formation (Tremadoc, Early Ordovician) of Cambrian-Ordovician Boundary. Journal of Paleontology, 54 (4):719~727.
[19]
Harris W J, Keble R A. 1928. The Staurograptus Bed of Victoria.Proceedings of the Royal Society of Victoria, 40: 91~ 95.
[20]
Jackson D E, Lenz A C. 2000. Some Graptolites from the Late Tremadoc and Early Arenig of Yukon, Canada. Canadian Journal of Earth Sciences, 37: 1177~1193.
[21]
Jackson D E, Norford B S. 2004. Biostratigraphical and Ecostratigraphical Significance of Tremadoc ( Ordovician )Graptolite Faunas from the Misty Creek Embayment and Selwyn Basin in Yukon and Northwest Territories. Canadian Journal of Earth Sciences, 41: 331~348.
[22]
Lapworth C. 1880. On new British graptolites. Annals and Magazine of Natural History, 5(5): 149~177.
[23]
Lapworth C. 1898. An Intermediate Textbook of Geology. 13th edition. Edinburgh and London.
[24]
Li Jijin, Ge Meiyu, Chen Xu. 1985. Xinchangian (Early Ordovician)Anisograptid Fauna from Taishan, Guangdong. Palaeontologia Cathayana, 2: 103~135.
[25]
Lindholm K. 1991. Ordovician graptolites from the early Hunneberg of southern Scandinavia. Palaeontology, 34(2): 283~327.
[26]
Maletz J, Egenhoff S. 2001. Late Tremadoc to early Arenig graptolite faunas of southern Bolivia and their implications for a worldwide biozonation. Lethaia, 34(1): 47~62.
[27]
Mu Enzhi, Lin Yaokun. 1984. The Xinchangian Graptolites from Western Zhejiang. In: Nanjing Institute of Geology and Palaeontology, Academia Sinica, ed. Stratigraphy and Palaeontology of Systemic Boundaries in China, Cambrian-Ordovician Boundary (1). Hefei: Anhui Science and Technology Publishing House, 165~182.
[28]
Ruedemann R. 1904. Graptolites of New York, Part 1. New York State Museum Memoir, 7.
[29]
Ruedemann R. 1937. A New North American Graptolite Faunule.American Journal of Science, 33(193): 57~62.
[30]
Ruedemann R. 1947. Graptolites of North America. Geological Society of America, Memoir, 19: 1~652.
[31]
Zhou Zhiyi, Wang Zhihao, Zhang Junming et Lin Yaokun. 1984.Cambrain-Ordovician Boundary Sections and the Prop osed Candidates for Stratotype in North and Northeast China. In:Nanjing Institute of Geology and Palaeontology, Academia Sinica,ed. Stratigraphy and Palaeontology of systemic boundaries in China, Cambrian-Ordovician Boundary (2), Hefei: Anhui Science and Technology Publishing House, 1~57.