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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
. 1917 Jan;3(1):17–22. doi: 10.1073/pnas.3.1.17

Physiographic Subdivision of the United States

Nevin M Fenneman 1
PMCID: PMC1091163  PMID: 16586678

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