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George Bernard Shaw, Heinrich Mann, P. Drieu La Rochelle, Ezra Pound, Robert Musil, Thornton Wilder, Victoria Ocampo, Alfonso Reyes, Pedro Salinas, Thomas Mann, Knut Hamsun, Some Letters from Old Files (1931-1951), Books Abroad, Vol. 50, No. 4 (Autumn, 1976), pp. 785-792
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Shaw et al. (1976) studied this question.
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