Between 1976 and 1979 , he worked as a research fellow at the CNRS , and was awarded a diploma of higher studies in air transport .
In 1973 , Ranariddh returned to the University of Provence , where he completed his PhD in 1975 .
Between 1976 and 1979 , Ranariddh worked as a research fellow at the CNRS , and was awarded a diploma of higher studies in air transport .
In 1973 , Ranariddh returned to the University of Provence , where he completed his PhD in 1975 .