Petrochenkov, D. A. (2018). CONCRETIONS WITH FOSSILS OF THE ULYANOVSK REGION - A NEW KIND OF JEWELRY-ORNAMENTAL RAW MATERIALS. Sergo Ordzhonikidze Russian State University for Geological Prospecting.
Chicago Style (17th ed.) CitationPetrochenkov, D. A. CONCRETIONS WITH FOSSILS OF THE ULYANOVSK REGION - A NEW KIND OF JEWELRY-ORNAMENTAL RAW MATERIALS. Sergo Ordzhonikidze Russian State University for Geological Prospecting, 2018.
MLA (9th ed.) CitationPetrochenkov, D. A. CONCRETIONS WITH FOSSILS OF THE ULYANOVSK REGION - A NEW KIND OF JEWELRY-ORNAMENTAL RAW MATERIALS. Sergo Ordzhonikidze Russian State University for Geological Prospecting, 2018.
Warning: These citations may not always be 100% accurate.