American Journal of Science: 248 (12)

Index by author

December 01, 1950; Volume 248,Issue 12

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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