TY  - BOOK
AU  - Épštejn, E. F.
ED  - "Today's drilling and coring methods", seminar
TI  - New methods of rock excavation and of exploration drilling
PY  - 1981///
CY  - M.
KW  - Тг162[Т131]
KW  - rubbk
N2  - Библиогр.: с. 19-22
ER  -