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American Chemical Society. Division of History of Chemistry, Benfey, O. T., & Kekulé, A. (1966). Kekulé centennial: A symposium co-sponsored by the Division of History of Chemistry, the Division of Organic Chemistry, and the Division of Chemical Education at the 150th meeting of the American Chemical Society, Atlantic City, N.J., Sept. 15-16, 1965. American Chemical Society.

American Chemical Society. Division of History of Chemistry, Otto Theodor Benfey, ja August Kekulé. Kekulé Centennial: A Symposium Co-sponsored by the Division of History of Chemistry, the Division of Organic Chemistry, and the Division of Chemical Education at the 150th Meeting of the American Chemical Society, Atlantic City, N.J., Sept. 15-16, 1965. Washington: American Chemical Society, 1966.

American Chemical Society. Division of History of Chemistry, et al. Kekulé Centennial: A Symposium Co-sponsored by the Division of History of Chemistry, the Division of Organic Chemistry, and the Division of Chemical Education at the 150th Meeting of the American Chemical Society, Atlantic City, N.J., Sept. 15-16, 1965. American Chemical Society, 1966.

American Chemical Society. Division of History of Chemistry, Benfey, O. T. & Kekulé, A. 1966. Kekulé centennial: A symposium co-sponsored by the Division of History of Chemistry, the Division of Organic Chemistry, and the Division of Chemical Education at the 150th meeting of the American Chemical Society, Atlantic City, N.J., Sept. 15-16, 1965. Washington: American Chemical Society.