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241
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243
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244by Campbell, K. S. W. (Kenton Stewart Wall)Subjects: “...Paleontology Silurian....”
Published 1967
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247
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248
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250
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251by Vaughan, Thomas Wayland, 1870-1952Subjects: “...Paleontology West Indies....”
Published 1919
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252
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253
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254Subjects: “...Paleontology Mississippian....”
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256
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257by Kesling, Robert V. (Robert Vernon), 1917-2005Subjects: “...Paleontology Ordovician....”
Published 1961
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