Philosophy

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Copenhagen, C. E. C. Gad, 1958.

WETTER, GUSTAV A.

New York, F. A. Praeger, (1958).

SCHULTZER, BENT.

Copenhagen, Levin & Munksgaard, 1935.

SIEBECK, HERMAN.

Stuttgart, Fr. Frommann (E. Hauff), 1905.

KUTSCHERA, FRANS von.

Berlin & New York, W. de Gruyter, 1976.

ISRAELI, ISAAC.

Oxford, University Press, 1958.

ANDERSON, JOHN M. & HENRY W. JOHNSTONE, JR.

Belmont, Wadsworth, (1962).

PAP, ATHUR.

Wien, Springer-Verlag, 1955.

KÖRNER, STEPHAN.

New York, Dover, (1959).

BACCOU, ROBERT.

Paris, Montaigne, (1951).

HOSPERS, JOHN.

London, Routledge and Kegan Paul Ltd, (1967).

QUINE, WILLARD ORMAN VAN (+) S. C. KLEENE.

(Wisconsin), The Association for Symbolic Logic, 1937.

FECHNER, GUSTAV THEODOR.

Leipzig, Hermann Mendelssohn, 1855.

GIBSON, JAMES J.

Boston, etc., Houghton Mifflin, 1950.

BRADLEY, F.H.

London, Allen & Unwin, (1920).

RUSSELL, BERTRAND.

New York, W.W. Norton & Company, Inc., 1928.

EINSTEIN, ALBERT.

Paris, Freien Deutschen Hochschule, 1938.

CHRISHOLM, RODERICK M.

New York, Cornell University Press, 1957.