Michal, Stanislav: Clocks and Watches of the 16th to the 20th centuries : a catalogue of clocks and watches 16the to the 20th century in the collections of National Technical Museum, Prague
Clocks and Watches of the 16th to the 20th centuries : a catalogue of clocks and watches 16the to the 20th century in the collections of National Technical Museum, Prague Michal, Stanislav