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56 Šn/547-sep.
HOWELL, Benjamin Franklin
Upper Cambrian Fossils from Bucks County, Pennsylvania / B.F. Howell. -- S.1-39 : 1 Fig., 5 Pls. -- In: Bulletin G28. -- Topographic and Geologic Survey. 1957. -- separát. -- bibl.. -- Citováno jako: HOWELL, B.F. Upper Cambrian Fossils from Bucks County,...Bulletin G28. 1957, S.1-39: 1 Fig., 5 pls.
Lingulella
Pemphigaspis
Welleraspis
Taboltina
Bucksella
Lonchocephalus
Coosia
Coosella
Genevievella
Trilobite
Indianites
56
63461
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