Conference on Clay Mineralogy and Petrography. Prague, Prague. Universita Karlova, & Czechoslovak Republic. (1961). Vtoraia Konferentsiia po mineralogii i petrografii glin v Prage: Second Conference on Clay Mineralogy and Petrography in Prague. Universita Karlova.
Style de citation Chicago (17e éd.)Conference on Clay Mineralogy and Petrography. Prague, Prague. Universita Karlova, et Czechoslovak Republic. Vtoraia Konferentsiia Po Mineralogii I Petrografii Glin V Prage: Second Conference on Clay Mineralogy and Petrography in Prague. Praha: Universita Karlova, 1961.
Style de citation MLA (8e éd.)Conference on Clay Mineralogy and Petrography. Prague, et al. Vtoraia Konferentsiia Po Mineralogii I Petrografii Glin V Prage: Second Conference on Clay Mineralogy and Petrography in Prague. Universita Karlova, 1961.