P283 283 YLE TEKSTJ-TV 7.12. 2214:10    NEWS IN ENGLISH Saturday Wj   OPEC warning on prices Opec oil ministers began a meeting in Geneva on Saturday,aimed at finding ways to keep oil prices steady. Before the meeting,Saudi Oil Minister Yamani warned that oil prices would fall drastically unless member st tes agree on policy changes. Yamani called for co-operation between the 13 Opec member states and other oil producing countries,outside the organisation. Unless production is restrained in the long term interests of all producers, an intense downward pressure may follow. Mitterand on Fabius 284 INDEX 280