Control of the observations applied to some coal technologies

by Glushkov, Alexey V., Grigorieva, Eugenia N., Grigoriev, Fedor N.
Source: 1. 6th Conference on environment and mineral processing, part I 1. Ostrava : Vysoká škola báňská - Technická univerzita, 2002 1. 8024800713 1. S. 283-287