TY  - BOOK
TI  - Problems of ore deposition. Fourth symposium of the International Association on the genesis of ore deposits. Varna, 1974
T2  - Mineral Assessment Jaarverslagen
SN  - 0 11 884219 6
PY  - 1977///
CY  - Sofia
PB  - Publishing House of thre Bulgarian Academy of Sciences
ER  -