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Table of Contents

December 01, 1950; Volume 248,Issue 12

Articles

  • You have access
    Tetrapods of the Pennsylvanian nodules from Mazon Creek, Illinois
    Joseph Tracy Gregory
    American Journal of Science December 1950, 248 (12) 833-873; DOI: https://doi.org/10.2475/ajs.248.12.833
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    Marine crevasse fillings in the Lotbiniere region, Quebec
    Freleigh Fitz Osborne
    American Journal of Science December 1950, 248 (12) 874-890; DOI: https://doi.org/10.2475/ajs.248.12.874
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    The Irvingella major ("Ptychopleurites") faunizone of the Upper Cambrian
    James Lee Wilson and Edward Arthur Frederickson
    American Journal of Science December 1950, 248 (12) 891-902; DOI: https://doi.org/10.2475/ajs.248.12.891
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American Journal of Science
Vol. 248, Issue 12
1 Dec 1950
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