TY  - BOOK
AU  - Govett, G. J. S.
AU  - Govett, M.
TI  - World mineral supplies: assessment and perspective 
U1  - 553 GOV 
PY  - 1976///
CY  - Amsterdam
PB  - Elsvier Scientific
KW  - Mines and mineral resources
N1  - Includes bibliographies
ER  -