TY  - BOOK
AU  - Fettweis Gunter B
TI  - World coal resources: Methods of assessment and results
T2  - Developments in economic geology; 10
U1  - HZ551, L9 
PY  - 1979///
CY  - Amsterdam
PB  - Elsevier Scientific Publishing       
KW  -  Geology
KW  -  Mineral
KW  -  Natrual resources
KW  - Coal
ER  -