@inproceedings{sgem2017s01057,
  title = {PRECIOUS AND DECORATIVE NON-METALLIC MINERALS FROM EAST KAZAKHSTAN: GEOLOGICAL DEPOSITS AND PRESENT UTILISATION},
  author = {Z. I. Chernenko and Jiri Chlachula},
  booktitle = {SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 17th International Multidisciplinary Scientific GeoConference SGEM2017, Science and Technologies in Geology, Exploration and Mining},
  year = {2017},
  pages = {447-454},
  publisher = {STEF92 Technology},
  doi = {10.5593/sgem2017/11/s01.057}
}