Beth, Evert W (1950). "Critical Epochs in the Development of the Theory of Science". British Journal for the Philosophy of Science. 1 (1): 27–42. doi:10.1093/bjps/I.1.27. S2CID121047594.
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Beth, Evert W (1950). "Critical Epochs in the Development of the Theory of Science". British Journal for the Philosophy of Science. 1 (1): 27–42. doi:10.1093/bjps/I.1.27. S2CID121047594.