Horský, Z., & Škopová, O. (1968). Astronomy gnomonics: A catalogue of instruments of the 15th to the 19th centuries in the collections of the National Technical Museum, Prague.
Chicago-Zitierstil (17. Ausg.)Horský, Zdeněk, und Otilie Škopová. Astronomy Gnomonics: A Catalogue of Instruments of the 15th to the 19th Centuries in the Collections of the National Technical Museum, Prague. Prague, 1968.
MLA-Zitierstil (9. Ausg.)Horský, Zdeněk, und Otilie Škopová. Astronomy Gnomonics: A Catalogue of Instruments of the 15th to the 19th Centuries in the Collections of the National Technical Museum, Prague. 1968.
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