A Monograph of the Trilobites of North America: with Coloured Models of the Species — To JOHN GEORGE CHILDREN, Esquire, F. R. S. L. & E.

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A Monograph of the Trilobites of North America: with Coloured Models of the Species To JOHN GEORGE CHILDREN, Esquire, F. R. S. L. & E. · ch 2/57

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