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Iowa
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Trilobites

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Current results range from 1913 to 1927

1.
Trilobites of Iowa and some related Paleozoic forms
Author
Walter, Otto Theodore
Published
[Des Moines, 1927]
Online
Online book
Location
HathiTrust Digital Library >> Online Resource
Format
Books / Online
2.
New trilobites from the Maquoketa beds of Fayette county, Iowa
Author
Slocom, Arthur Ware, 1860-
Published
Chicago : Field Museum of Natural History , 1913.
Online
Fieldiana, Geology, Vol.4, No.3
Location
HathiTrust Digital Library >> Online Resource
Format
Books / Online