TY  - BOOK
AU  - Hamak,John E.
AU  - Sigler,Stella
ED  - United States.
TI  - Analyses of natural gases, 1990
T2  - Information circular
PY  - 1990///
CY  - Washington, D.C.
PB  - U.S. Dept. of the Interior, Bureau of Mines
KW  - Natural gas
KW  - United States
KW  - Analysis
ER  -