File:Descriptions of New Species of Fossils, from the Marshall Group of Michigan, and Its Supposed Equivalents, in Other States; With Notes on Some Fossils of the Same Age Previously Described (IA biostor-120618).pdf
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![File:Descriptions of New Species of Fossils, from the Marshall Group of Michigan, and Its Supposed Equivalents, in Other States; With Notes on Some Fossils of the Same Age Previously Described (IA biostor-120618).pdf](https://upload.wikimedia.org/wikipedia/commons/thumb/b/b7/Descriptions_of_New_Species_of_Fossils%2C_from_the_Marshall_Group_of_Michigan%2C_and_Its_Supposed_Equivalents%2C_in_Other_States%3B_With_Notes_on_Some_Fossils_of_the_Same_Age_Previously_Described_%28IA_biostor-120618%29.pdf/page1-368px-thumbnail.pdf.jpg?20210121132923)
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