- Sema, « Long term world prospects for petrochemicals up to 1990 : scenarios of world petrochemicals. 1 : Construction of the base », HAL-SHS : sciences politiques, ID : 10670/1.pwyiwh
The purpose of this report is to describe the work carried out to date as part of the study "Long term prospects for petrochemicals" which will serve as a basis for the construction of scenarios for the development of the industry to the year 1990.