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Showing 1 to 1 of 1 for “"Devonian boundary"”.
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The Stratigraphy of The Formations at and Beneath The Middle-Upper Devonian Boundary in Southern Illinois
Made available in DSpace on 2014-12-09T20:34:36Z (GMT). No. of bitstreams: 1 6915356.pdf: 2902740 bytes, checksum: 32c743e0ff0b1c04c7a58422aae4b5bf (MD5) Previous issue date: 1969