71. Garfield, Eugene. “The Illogical Calculus of Information Retrieval”. Paper presented at the 1st Annual Symposium on Biomathematics and Computer Science in the Life Sciences, Houston, Texas, 1963 March 28-30, 1963, 1965

71. Garfield, Eugene. “The Illogical Calculus of Information Retrieval”. Paper presented at the 1st Annual Symposium on Biomathematics and Computer Science in the Life Sciences, Houston, Texas, 1963 March 28-30, 1963, 1965, Box: 90, Folder: 36. Eugene Garfield Papers, 2009-036. Science History Institute Archives. https://sciencehistory.libraryhost.com/repositories/3/archival_objects/20850 Accessed November 28, 2024.