World Energy Conference, 9th, Detroit, 1974, Ferber, R. R., & Roxas, R. A. (1975). Transactions: 9th World Energy Conference Sept. 23-27, 1974, Detroit = Compterendu : 9eme Conference mondiale de l'energie, 23-27 Sept., 1974, Detroit. U.S. National Committee of the World Energy Conference.

World Energy Conference, 9th, Detroit, 1974, Robert R. Ferber, and Richard A. Roxas. Transactions: 9th World Energy Conference Sept. 23-27, 1974, Detroit = Compterendu : 9eme Conference Mondiale De L'energie, 23-27 Sept., 1974, Detroit. New York: U.S. National Committee of the World Energy Conference, 1975.

World Energy Conference, 9th, Detroit, 1974, et al. Transactions: 9th World Energy Conference Sept. 23-27, 1974, Detroit = Compterendu : 9eme Conference Mondiale De L'energie, 23-27 Sept., 1974, Detroit. U.S. National Committee of the World Energy Conference, 1975.