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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 Apr;47(4):428–449. doi: 10.1073/pnas.47.4.428

PHENOMENA ASSOCIATED WITH POPULATION DENSITY*

John J Christian 1,2
PMCID: PMC221470  PMID: 13693391

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