TY  - SER
AU  - Chem,Xu
AU  - Melchin,Michael
AU  - Fan,Jun-Xuan
AU  - Mitchell,Charles
TI  - Ashgillian graptolite fauna of the Yangtze region and the biogeographical distribution of diversity in the latest ordovician
N1  - bibliogr. p. 147-148
ER  -