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- Jacobi, Carl. Carl Jacobi Collection. Browne Popular Culture Library. Bowling Green State University.
- Jacobs, Harvey. Harvey Jacobs Papers. Special Collections Research Center. Syracuse University.
- Jaffery, Sheldon R. Sheldon R. Jaffery Collection. Browne Popular Culture Library. Bowling Green State University.
- Jazmann, Sheila. Sheila Jazmann Collection. Cushing Memorial Library & Archives. Texas A&M University.
- Jenkins, Will. See Leinster, Murray.
- Jeter, K.W. K.W. Jeter Collection. Cushing Memorial Library & Archives. Texas A&M University.
- Johnson, Kij. Kij Johnson Papers. Kenneth Spencer Research Library, University of Kansas. Awaiting processing; please contact curator for additional information.
- Jones, Diana Wynne. Diana Wynne Jones Archive. "Seven Stories" National Centre for Children's Books. Gateshead, UK
- Jones, Neil R. Neil R. Jones Papers. Special Collections Research Center. Syracuse University.
- Jordan, Robert (James O. Rigney). James O. Rigney Papers. Special Collections, College of Charleston.