TY  - BOOK
AU  - Hetherington,L.E.
ED  - British Geological Survey.
TI  - World mineral production : : 2002-2006 / 
SN  - 978-0-85272-614-3
PY  - 2008///
CY  - Nottingham (Inglaterra) : 
PB  - British Geological Survey, 
KW  - Mineria
ER  -