Journal Article SOME PROBLEMS AND PATTERNS OF EVOLUTION EXEMPLIFIED BY FOSSIL INVERTEBRATES Get access Preston E. Cloud, Jr. Preston E. Cloud, Jr. Museum of Comparative Zoology Harvard University Cambridge Massachusetts Search for other works by this author on: Oxford Academic Google Scholar Evolution, Volume 2, Issue 4, 1 December 1948, Pages 322–350, https://doi.org/10.1111/j.1558-5646.1948.tb02750.x Published: 01 December 1948 Article history Received: 16 June 1948 Published: 01 December 1948
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