39. Garfield, Eugene. "A Unified Index to Science", Proceedings of the International Conference on Scientific Information. 1958. Washington, D.C.: National Academy of Sciences - National Research Council, 1, p. 461-74, 1959. Conference Proceedings. Reprinted in: Current Contents, 1976 December 27, p. 5-20. Essays of an Information Scientist, Vol. 2, p. 672-688, 1958-1962

39. Garfield, Eugene. "A Unified Index to Science", Proceedings of the International Conference on Scientific Information. 1958. Washington, D.C.: National Academy of Sciences - National Research Council, 1, p. 461-74, 1959. Conference Proceedings. Reprinted in: Current Contents, 1976 December 27, p. 5-20. Essays of an Information Scientist, Vol. 2, p. 672-688, 1958-1962, Box: 90, Folder: 1. Eugene Garfield Papers, 2009-036. Science History Institute Archives. https://sciencehistory.libraryhost.com/repositories/3/archival_objects/20815 Accessed November 28, 2024.