TY  - BOOK
AU  - Malkovsky,M.
AU  - Cepek,L.
TI  - Proceedings of section 11 - Origin of Coal Deposits
T2  - Mineral Assessment Jaarverslagen
SN  - 0 11 880752 8
PY  - 1968///
CY  - Prague
PB  - Academia
ER  -