TY  - BOOK
AU  - Paraschiv,D.
AU  - Filipescu,M.
AU  - Filipescu,M.
ED  - World Petroleum Congress (10th : 1979 sept. 9-14 : Bucharest)
TI  - Variation of non hydrocarbon constituents of natural gas in different romanian areas
U1  - 060-665.5 W938 1979 
ER  -