scienza TecaLibri Boris Hessen: opere 1931 Science at the Crossroads, Frank Cass, Londra, 1971, [rif.] in: Nikolai Bukharin 1931 The Social and Economic Roots of Newton's "Principia", Frank Cass, London, 1971, [rif.] in: N. I. Bukharin, Science at the Cross Roads