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Problems in the philosophy of science.

Amsterdam North-Holland Pub. Co. 1968 .
ix, 448 p. , "Organized jointly by the British Society for the Philosophy of Science and the London School of Economics and Political Science, under the auspices of the Division of Logic, Methodology, and Philosophy of Science of the International Union of History and Philosophy of Science."

Problems in the philosophy of mathematics.

Amsterdam North-Holland Pub. Co. 1967 .
xv, 241 p. , "Organized jointly by the British Society for the Philosophy of Science and the London School of Economics and Political Science, under the auspices of the Division of Logic, Methodology, and Philosophy of Science of the International Union of [the] Histo,y and Philosophy of Science." 23 cm..