https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fullf.web&search1=R=132429
Department of Energy, Mines and Resources Canada, 1991
Trilobites from a 946 m thick measured section of the Illtyd Formation were collected from 25 horizons belonging to the upper half of the Bonnia - O!ene!/us...
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