Hradilek, L. (1984). Three-dimensional terrestrial triangulation: Applications in surveying engineering. Konrad Wittwer.
Chicago-viite (17. p.)Hradilek, Ludvik. Three-dimensional Terrestrial Triangulation: Applications in Surveying Engineering. Stuttgart: Konrad Wittwer, 1984.
MLA-viite (9. p.)Hradilek, Ludvik. Three-dimensional Terrestrial Triangulation: Applications in Surveying Engineering. Konrad Wittwer, 1984.
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