TY  - BOOK
AU  - Vergara Walter
TI  - Natural gas:  Its role and potential in economic theory   
T2  - Westview Special Studies In natural Resoruces And Energy Management
SN  - 0813378125
U1  - X9(F558).1(X).N8, N0 
PY  - 1990///
CY  - Boulder
PB  - Westview Press         
KW  - Gas Industry
N1  - Appendix p. 291-314
ER  -