TY  - BOOK
AU  - Campbell,John M.
AU  - Campbell,Robert A.
AU  - Campbell,Robert A.
TI  - Mineral property economics: Vol. 1 : Economics principles and strategies ; Vol. 2 : Energy sources and systems ; Vol. 3 : Petroleum property evaluation
U1  - 622 C187 0006012 
PY  - 1978///
CY  - Oklahoma
PB  - Campbell Petroleum
ER  -