Olkuśnik, Marek. 2013. “The True Tourist at the End of the Belle époque. The Unusually Travels of Stanisław Twardo in the Light of His Unpublished Memoirs”. Studia Z Historii Społeczno-Gospodarczej XIX I XX Wieku 12 (January):41-55. https://doi.org/10.18778/2080-8313.12.04.