* 18 - 28, Divonne-les-Bains (Francia), "Pel's 26th International
Petroleum Executive Seminar". Per informazioni: Miss L. A. Bolton,
Education Administration, 7 Copthall Avenue, London EC2R 7BU, U.K.
Tel. 0044 - 71/638.37.58, fax 0044 - 71/638.37.08.
* 26 ...