Perspectives de developpement de la peninsule indochinoise actes du 6e colloque international de l'I. C. I., Ottawa... 8, 9, 10 et 11 Avril 1974 Prospects for development of the Indochinese peninsula : proceedings of the 6th international conference of the I. C. I., Ottawa... April 8, 9, 10 and 11, 1974 . (Travaux et documents de I'I. C. I. series A, 1975)