1. Bulletin international: résumés des travaux présentés Type: model:periodicalitem and TEXT Language: English, French, and Russian Description: 1 Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
2. Publications of the Astronomical Institute of the Academy of Sciences of the Czech Republic Type: model:periodicalitem and TEXT Language: Czech and French Description: 1 and Troisième etude sur l'appareil circumzénithal Nušl-Frič (1ère partie) Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3. Publications of the Astronomical Institute of the Academy of Sciences of the Czech Republic Type: model:periodicalitem and TEXT Language: Czech and French Description: 2 and Troisième etude sur l'appareil circumzénithal Nušl-Frič (2ième partie) Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
4. Publications of the Astronomical Institute of the Academy of Sciences of the Czech Republic Type: model:periodicalitem and TEXT Language: Czech and French Description: 3 and Comparaison mondiale des pendules: fractionnaire Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public