
Quote in his 'Preface' by Richard Huelsenbeck, New York, November 1958, in Phantastische Gebete; published by Arche Verlag, Zurich, 1960 (transl. by Johannes Beilharz, 2000)
1921 - 1950
Source: 'Appreciations of other artists': Jean (Hans) Arp (sculptor, painter, writer) 1949, by Marcel Duchamp; as quoted in Catalog, Collection of the Societé Anonyme, eds. Michel Sanouillet / Elmer Peterson, London 1975, pp. 143- 159
Quote in his 'Preface' by Richard Huelsenbeck, New York, November 1958, in Phantastische Gebete; published by Arche Verlag, Zurich, 1960 (transl. by Johannes Beilharz, 2000)
Ch 11. "The Demarcation between Science and Metaphysics." (Summary, p. 253)
Conjectures and Refutations: The Growth of Scientific Knowledge (1963)
Source: 1961 - 1975, Barbara Hepworth, A Pictorial autobiography', 1970, p. 283
Source: 1969 - 1980, In: "Ellsworth Kelly: Works on Paper," 1987, p. unknown : 'Notes from 1969'
Notice sur les Titres et Travaux scientifiques de Pierre Duhem rédigée par lui-même lors de sa candidature à l'Académie des sciences (mai 1913), The Aim and Structure of Physical Theory (1906)
Source: 1960s, Jours effeuillés: Poèmes, essaies, souvenirs (1966), p. 383
As quoted in "Democracy? It was better under apartheid, says Helen Suzman" https://web.archive.org/web/20120901223952/https://www.telegraph.co.uk/news/uknews/1462042/Democracy-It-was-better-under-apartheid-says-Helen-Suzman.html (15 May 2004), by Jane Flanagan, The Telegraph
2000s
"Answers to Questions," from Mid-Century American Poets, edited by John Ciardi, 1950 [p. 170]
Kipling, Auden & Co: Essays and Reviews 1935-1964 (1980)
Source: An Economist's Protest: Columns in Political Economy (1966), p. 163