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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
. 1927 Aug;13(8):574–575. doi: 10.1073/pnas.13.8.574

The Flora of the Hermit Shale in the Grand Canyon, Arizona

David White 1
PMCID: PMC1085121  PMID: 16587225

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