American University of Beirut & Symposium on the Triplet State American University of Beirut. (1967). The triplet state: Proceedings of an international symposium held at the American University of Beirut, Lebanon, 14-19 February 1967. Cambridge U.P..

American University of Beirut và Symposium on the Triplet State American University of Beirut. The Triplet State: Proceedings of an International Symposium Held at the American University of Beirut, Lebanon, 14-19 February 1967. London: Cambridge U.P., 1967.

American University of Beirut và Symposium on the Triplet State American University of Beirut. The Triplet State: Proceedings of an International Symposium Held at the American University of Beirut, Lebanon, 14-19 February 1967. Cambridge U.P., 1967.