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[[image: post card]] [[preprinted]] Correspondenz - Karte Korespondencni Listek [[/preprinted]] Herrn J. Popper Ingenieur [[preprinted]]in v [[/preprinted]] VII Apollogasse 6 Wien [[right margin]] [[preprinted]](Böhm.) [[/preprinted]] [[/right margin]] [[end postcard]] fol. 1-39 Briefe von E. Mach Dürfen nur dann benutzt werden, wenn sowohl [[underline]] Mach [[/underline]] [also?] [[underline]] ich [[/underline]] gestorben ist. Josef Popper München 6. Februar 1911