(1985). Holidays and travel in 2035 =: Ferien und Reisen im Jahre : organized on the occasion of the 50 th Anniversary 1935-1985 of Hotelplan International Travel Organization Ltd. Ruschlikon/Zurich: GDI.
Παραπομπή Chicago StyleHolidays and Travel in 2035 =: Ferien Und Reisen Im Jahre : Organized On the Occasion of the 50 Th Anniversary 1935-1985 of Hotelplan International Travel Organization Ltd. Ruschlikon/Zurich: GDI, 1985.
Παραπομπή MLAHolidays and Travel in 2035 =: Ferien Und Reisen Im Jahre : Organized On the Occasion of the 50 Th Anniversary 1935-1985 of Hotelplan International Travel Organization Ltd. Ruschlikon/Zurich: GDI, 1985.
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