The American gas group BARETT RESOURCES accepted the offer to buy made by its competitor and fellow national WILLIAMS for a total of USD 2.8 billion in cash and shares, including USD 300 million in debt take-over. BARETT had previously rejected two successive offers from the Anglo-Dutch ROYAL DUTCH SHELL at respectively USD 55 and 60. WILLIAMS offers USD 73 per share in cash for half the BARETT shares and 1.767 of its shares for each BARETT share.