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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
. 1958 Jun;44(6):546–553. doi: 10.1073/pnas.44.6.546

WALL THICKENING IN SIEVE ELEMENTS

Katherine Esau 1, Vernon I Cheadle 1
PMCID: PMC528617  PMID: 16590237

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