Гайко, Г., Білецький, В., & Білецький, В. Who discovered the Donetsk coal basin and when it was discovered. Borys Grinchenko Kyiv Metropolitan University.
Chicago Style (17th ed.) CitationГайко, Геннадій, Володимир Білецький, and Віталій Білецький. Who Discovered the Donetsk Coal Basin and When It Was Discovered. Borys Grinchenko Kyiv Metropolitan University.
MLA (9th ed.) CitationГайко, Геннадій, et al. Who Discovered the Donetsk Coal Basin and When It Was Discovered. Borys Grinchenko Kyiv Metropolitan University.
Warning: These citations may not always be 100% accurate.