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- Rambo, Cat. Cat Rambo Papers. SFWA Collection, Rare Books and Special Collections, Northern Illinois University. Please contact curator for information on unprocessed materials.
- Randall, Marta. Marta Randall papers. Special Collections and University Archives. University of Oregon.
- Rasovsky, Yuri [Radio producer]. Yuri Rasovsky Collection. American Radio Archives and Museum. Thousand Oaks Library System.
- Reed, Kit. Joseph W. and Kit Reed Papers. YCAL MSS 843. Beinecke Rare Book and Manuscript Library. Yale University.
- Reginald, Robert. Robert Reginald papers. Special Collections and University Archives. Tomás Rivera Library. University of California, Riverside.
- Reisman, Jessica. Jessica Reisman Collection. Cushing Memorial Library & Archives. Texas A&M University.
- Resnick, Mike. Mike Resnick Collection. Special Collections. University of South Florida.
- Rich, Mark. Mark Rich Papers. SFWA Collection, Rare Books and Special Collections, Northern Illinois University. Please contact curator for information on unprocessed materials.
- Riordan, Rick. Rick Riordan Papers. The Witliff Collections. Texas State University.
- Roberson, Jennifer. Jennifer Roberson Collection. Cushing Memorial Library & Archives. Texas A&M University.
- Robinson, Kim Stanley. Manuscript Collection. Merril Collection of Science Fiction, Speculation and Fantasy. Toronto Public Library.
- Robson, Kelly. Alyx Dellamonica & Kelly Robson Collection. Cushing Memorial Library & Archives. Texas A&M University.
- Romero, George. George A. Romero Archival Collection. Horror Studies Collection. Archives & Special Collections. University of Pittsburgh. Currently in process.
- Ronald, Margaret. Margaret Ronald Papers. SFWA Collection, Rare Books and Special Collections, Northern Illinois University.
- Rosenblum, Mary. Mary Rosenblum Papers. MS 362. Kenneth Spencer Research Library, University of Kansas.
- Rotsler, William. William Rotsler papers. Special Collections and University Archives. Tomás Rivera Library. University of California, Riverside.
- Rusch, Kristine Kathryn.
- Russ, Joanna.
- Russell, Eric Frank.