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Late Wenlock and Ludlow (Silurian) ; Plectograptinae (retiolitid Graptolites) ; Cape Phillips Formation, Arctic Canada

Alfred C. LenzHéctor A. LeanzaKenneth A. HodgkinsonChristopher L. GarvieAllan W. H. Bé

出版	Paleontological Research Institution, 1986
ISBN	08771042639780877104261
URL	http://books.google.com.hk/books?id=8xXBwAEACAAJ&hl=&source=gbs_api