TY  - BOOK
AU  - Tapp,B.A.
AU  - Watkins, J. R.
TI  - Energy and mineral resource systems: an introduction 
SN  - 0521302870
PY  - 1990///
CY  - Cambridge, Eng.
PB  - Cambridge University Press
KW  - Mines and mineral resources
KW  - Energy minerals
KW  - Power resources
ER  -