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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
. 1961 Nov;47(11):1716–1726. doi: 10.1073/pnas.47.11.1716

AN EVALUATION OF STUDIES ON ULTRASTRUCTURE OF SIEVE PLATES

Katherine Esau 1, Vernon I Cheadle 1
PMCID: PMC223201  PMID: 16590894

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