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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
. 1934 Sep;20(9):532–536. doi: 10.1073/pnas.20.9.532

A Discrimination without Previous Conditioning

B F Skinner 1,*
PMCID: PMC1076473  PMID: 16577633

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