(r) «On the Theory of the Objective Mind», Akten des XIV International Kongresses für Philosophie, 1, University of Vienna, Verlag Herder, Vienna, pp. 25–53.
(s) «Epistemology Without a Knowing Subject», Proceedings of the Third International Congress for Logic, Methodology and Philosophy of Science: Logic, Methodology and Philosophy of Science III, edited by B. van Rootselaar and J. F. Staal, North-Holland Publishing Company, Amsterdam, pp. 333–373.
(t) «Emancipation through Knowledge», in The Humanist Outlook, edited by A. J. Ayer, Pemberton Publishing Company, London, pp. 281–296.
(e) Logik der Forschung, third edition, J.C.B. Mohr (Paul Siebeck), Tübingen.
(h) Conjectures and Refutations, The Growth of Scientific Knowledge, third edition, Routledge & Kegan Paul, London.
(j) «A Pluralist Approach to the Philosophy of History», Roads to Freedom: Essays in Honour of Friedrich A. von Hayek, edited by Erich Streissler, Gottfried Haberler, Friedrich a. Lutz and Fritz Machlup, Routledge & Kegan Paul, London, pp. 181-200.
(k) «The Aim of Science», Contemporary Philosophy: A Survey, edited by Raymond Klibansky, III: Metaphysics, Phenomenology, Language and Structure, La Nuova Italia Editrice, Florence, pp. 129–142.
(m) «Die Logik der Sozialwissenschaften», in Der Positivismusstreit in der deutschen Soziologie, edited by H. Maus and F. Fürstenberg, Hermann Luchterhand Verlag, Neuwied and Berlin, pp. 103–123. (See also [1976(b)].)
(d) «Plato, Timaeus54E-55A», The Classical Review, XX, pp. 4–5.
(l) «A Realist View of Logic, Physics, and History», Physics, Logic and History, edited by Wolfgang Yourgrau and Allen D. Breck, Plenum Press, New York and London, pp. 1-30, and 35–37.
(g) «Revolution oder Reform?», in Revolution oder Reform? Herbert Marcuse und Karl Popper — Eine Konfrontation, edited by Franz Stark, Kösel-Verlag, Munich, pp.3, 9-10, 22–29, 34–39, 41. (English translation [1972(f)].)
(i) «Conjectural Knowledge: My Solution of the Problem of Induction», Revue Internationale de Philosophie, No. 95–96,25fasc. 1–2, pp. 167–197.
(1) «Conversation with Karl Popper», in Modern British Philosophy by Bryan Magee, Seeker & Warburg, London, pp. 66–82.
(n) «Particle Annihilation and the Argument of Einstein, Podolsky, and Rosen», Perspectives in Quantum Theory: Essays in Honor of Alfred Landé, editedby Wolfgang Yourgrau and Alwyn van der Merwe, M.I.T. Press, Cambridge, Mass., and London, pp. 182–198.
(a) Objective Knowledge: An Evolutionary Approach, Clarendon Press, Oxford.
(f) «On Reason & the Open Society: A Conversation», Encounter, 38, No. 5, pp. 13–18.
(a) «Indeterminism is Not Enough», Encounter,40, No. 4, pp. 20–26.
(n) Die offene Gesellschaft und ihre Feinde, volumes I and II, third edition, Francke Verlag, Bern and Munich.
(b) «Autobiography of Karl Popper», in The Philosophy of Karl Popper, in The Library of Living Philosophers, edited by P. A. Schilpp, volume I, Open Court Publishing Co., LaSalle, pp. 3-181.
(c) «Replies to my Critics», in The Philosophy of Karl Popper, in The Library of Living Philosophers, edited by P. A. Schilpp, volume II, Open Court Publishing Co., LaSalle, pp. 961-1197.
(z2) «Scientific Reduction and the Essential Incompleteness of All Science», in Studies in the Philosophy of Biology, edited by F. J. Ayala and T. Dobzhansky, Macmillan, London, pp. 259–284; also University of California Press, Berkeley.
(z3) «Normal Science and Its Dangers», in Criticism and the Growth of Knowledge, edited by imre Lakatos and Alan Musgrave, Cambridge University Press, pp. 51–58.
(o) «How I See Philosophy», in The Owl of Minerva. Philosophers on Philosophy, edited by C. T. Bontempo and S. J. Odell, McGrawHill, New York, pp. 41–55.
(p) «The Rationality of Scientific Revolutions», in Problems of Scientific Revolution. Progress and Obstacles to Progress in the Sciences, The Herbert Spencer Lectures 1973, edited by Rom Harre, Clarendon Press, Oxford, pp. 72-101.
(t) «Wissenschaft und Kritik», in Idee und Wirklichkeit: 30 Jahre Europäisches Forum, Alpbach, Springer-Verlag, Vienna and New York, pp. 65–75.
(a) Logik der Forschung, sixth revised impression, J. С. В. Mohr (Paul Siebeck), Tübingen.
(b) «The Logic of the Social Sciences», in The Positivist Dispute in German Sociology, Heinemann Educational Books, London, pp. 87-104.
(c) «Reason or Revolution?», in The Positivist Dispute in German Sociology, Heinemann Educational Books, London, pp. 288–300.
(h) «A Note on Verisimilitude», The British Journal for the Philosophy of Science, 27, pp. 147-59.
(o) «The Myth of the Framework», in The Abdication of Philosophy. Philosophy and the Public Good. Essays in Honor of Paul Arthur Schilpp, edited by Eugene Freeman, Open Court, La Salle, pp. 23–48.
(s) The Poverty of Historicism, ninth impression, Routledge & Kegan Paul, London.
(t) Conjectures and Refutations, sixth impression, Routledge & Kegan Paul, London.