1. Remember that the first translation of Duhem into English (by P. G. Wiener) did not follow until 1954! And the earliest contributions by J. Agassi, A. Grünbaum, N. R. Hanson which discussed Duhem did not appear until the end of the 1950’s. Amongst the descriptions of neo-positivism the contribution of conventionalism was merited a separate section at least in Kolakowski 1971, however.
2. Compare Duhem 1906, ch. 6; Rey 1905 (1908, pp. 122ff.). Compare also Grünbaum 1960; Giannoni 1967; Harding 1976; Diederich 1974; Schnäelbach 1971: 165ff.
3. See also Neurath 1915b, and the description, rich in historical materials, by Stadler 1982b, pp. 11–125.
4. As one can see from the index of Neurath 1981, Mach, Poincaré and Duhem are the most cited names, aside from himself and his contemporaries.
5. Compare the eulogy for Hans Hahn by Philipp Frank (1934) where Hahn is called the “real founder of the ‘Vienna Circle’”; cf. Haller 1982b and Menger 1980.