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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1929 May 15;15(5):448–452. doi: 10.1073/pnas.15.5.448

THE OPALINDAE AND THEIR SIGNIFICANCE

Maynard M Metcalf 1
PMCID: PMC522487  PMID: 16577201

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