21. Garfield, Eugene. "The Preparation of Printed Indexes by Automatic Punched-Card Techniques", American Documentation, 6 (2), p. 68-76, 1955. Reprinted in: Essays of an Information Scientist, Vol. 6, p. 459, 1983, 1953-1955

21. Garfield, Eugene. "The Preparation of Printed Indexes by Automatic Punched-Card Techniques", American Documentation, 6 (2), p. 68-76, 1955. Reprinted in: Essays of an Information Scientist, Vol. 6, p. 459, 1983, 1953-1955, Box: 89, Folder: 34. Eugene Garfield Papers, 2009-036. Science History Institute Archives. https://sciencehistory.libraryhost.com/repositories/3/archival_objects/20796 Accessed November 05, 2024.