1
World petroleum congress vol 0014: proceedings vol 0003: downstream, natural gas, environmental business / management, research, transportation,  Stavanger, 29.05.94-01.06.94
Book
1994
...GWA - Raw material economy, raw material policy...
2
World petroleum congress 0013: proceedings vol 0003: processing and products, Buenos-Aires, 1991
Book
1992
...GWA - Raw material economy, raw material policy...