64. Garfield, Eugene, Sher, I.H., and Sopinsky, Phillip. "Article-by-Article Evaluation of Abstracting Services—Time Lag, Overlap, and Gaps”, Automation and Scientific Communication, Topic 7; Secondary Distribution of Information. 26th Annual Meeting of American Documentation Institute, Chicago, Illinois, 1963 October 6-11, 1963

64. Garfield, Eugene, Sher, I.H., and Sopinsky, Phillip. "Article-by-Article Evaluation of Abstracting Services—Time Lag, Overlap, and Gaps”, Automation and Scientific Communication, Topic 7; Secondary Distribution of Information. 26th Annual Meeting of American Documentation Institute, Chicago, Illinois, 1963 October 6-11, 1963, Box: 90, Folder: 29. Eugene Garfield Papers, 2009-036. Science History Institute Archives. https://sciencehistory.libraryhost.com/repositories/3/archival_objects/20843 Accessed November 05, 2024.