249. Cawkell, Anthony E. and Garfield, Eugene. "The Cost-Effectiveness and Cost-Benefits of Commercial Information Services (Ash, J.E., Hyde, E. eds.), Chemical Information Systems, Halsted Press: a division of John Wiley and Sons, Incorporated, New York, New York", p. 73-85, 1975. Reprinted in: Current Contents #34, 1975 August 25; Essays of an Information Scientist, Vol. 2, p. 328, 1975, 1975

249. Cawkell, Anthony E. and Garfield, Eugene. "The Cost-Effectiveness and Cost-Benefits of Commercial Information Services (Ash, J.E., Hyde, E. eds.), Chemical Information Systems, Halsted Press: a division of John Wiley and Sons, Incorporated, New York, New York", p. 73-85, 1975. Reprinted in: Current Contents #34, 1975 August 25; Essays of an Information Scientist, Vol. 2, p. 328, 1975, 1975, Box: 93, Folder: 21. Eugene Garfield Papers, 2009-036. Science History Institute Archives. https://sciencehistory.libraryhost.com/repositories/3/archival_objects/21019 Accessed October 18, 2024.