1990 – Summertide parts 1-5 Box 28, Folder 6 Collection Context USF Libraries - Tampa Special Collections Charles Sheffield papers, 1977-2002…
1990 – The Double Spiral Staircase Box 47, Folder 39 Collection Context USF Libraries - Tampa Special Collections Charles Sheffield papers, 1977-2002…
1990 – The Double Spiral Staircase (short story) Box 28, Folder 5 Collection Context USF Libraries - Tampa Special Collections Charles Sheffield papers, 1977-2002…
[1990?] – Thematic Aberration Box 47, Folder 44 Collection Context USF Libraries - Tampa Special Collections Charles Sheffield papers, 1977-2002…
1990 – The Unlicked Bear-whelp Box 47, Folder 42 Collection Context USF Libraries - Tampa Special Collections Charles Sheffield papers, 1977-2002…
1990 – The Unlicked Bear-Whelp parts 1-2 (essay) Box 28, Folder 1 Collection Context USF Libraries - Tampa Special Collections Charles Sheffield papers, 1977-2002…
1990 - UF - College of Medicine Box 27, Folder 8 Collection Context USF Libraries - Tampa Special Collections Dr. Charles S. Mahan papers, 1949-2023, Date acquired: 01/10/2010, bulk 1982-2001…
1990 - UF - Shands Hospital Box 27, Folder 9 Collection Context USF Libraries - Tampa Special Collections Dr. Charles S. Mahan papers, 1949-2023, Date acquired: 01/10/2010, bulk 1982-2001…
1990 United States Wave Ski Championships, 1990. Collection Context UCF Special Collections Glenn "Marty" Stein Collection of Cartoon Art, 1955-2013, bulk 1970-2013
1990: Voltage membrane manuscript, 1990 Box 170, Folder 8 Collection Context FSU Special Collections & Archives Dexter M. Easton Papers, 1945-2010, Date acquired: 12/09/2010…