SILICITES OF THE NORTHERN CAUCASUS AND THEIR UTILIZATION
Title of journal International Geology Review
Year 1990
Volume 32
Pages 1051-1059
Website http://www.tandfonline.com/doi/abs/10.1080/00206819009465838
Author: V. I. Sedletsky, Yu. V. Agarkov, N. I. Boyko, B. V. Talpa,