ISOCOLID TRILOBITES CYPHONISCUS SALTER, 1853 AND EFFNASPIS GEN-NOV IN APPALACHIAN REGION OF CANADA AND USA

被引:8
作者
DEAN, WT
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D O I
10.1139/e72-033
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
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页码:415 / +
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