JSTOR, 1946

Journal of the History of Ideas, Inc., 1946

Journal of Philosophy, Inc., 1948

Journal of the History of Ideas, Inc., 1945

JSTOR, 1945

Journal of Philosophy, Inc., 1941

Longmans, Green, and Co., 1941

Longmans, Green, and Co., 1941

Journal of Philosophy, Inc., 1941

Cambridge University Press (CUP), 1938

Oxford University Press (OUP), 1938

Oxford University Press (OUP), 1938

Walter de Gruyter GmbH, 1927

Walter de Gruyter GmbH, 1927

JSTOR, 1962

Philosophy Documentation Center, 1956

Philosophy Documentation Center, 1954

JSTOR, 1954

JSTOR, 1953

Philosophy Documentation Center, 1948