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May 01, 1999
Graptolite biozonation of the Wenlock Series (Silurian) of the Builth Wells district, central Wales
Jan Zalasiewicz;
Jan Zalasiewicz
University of Leicester, Department of Geology, Leicester, United Kingdom
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Mark Williams
Mark Williams
British Geological Survey, United Kingdom
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Geological Magazine (1999) 136 (3): 263–283.
Article history
first online:
02 Mar 2017
Citation
Jan Zalasiewicz, Mark Williams; Graptolite biozonation of the Wenlock Series (Silurian) of the Builth Wells district, central Wales. Geological Magazine 1999;; 136 (3): 263–283. doi:
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