1. Notecard with photo of the yellow fever laboratory in Rio de Janeiro, and inset photos of rhesus monkeys in lower corners Creator: Soper, Fred Lowe, 1893-1977 Date: [ca. 1938] Genre: Photographic printsLetters (correspondence)
2. Letter from Lewis Hackett to Fred L. Soper Creator: Hackett, Lewis Date: 9 March 1958 Genre: Letters (correspondence)
3. Letter from Fred L. Soper to Lewis Hackett Creator: Soper, Fred Lowe, 1893-1977 Date: December 1939 Genre: Letters (correspondence)Poems
4. Letter from Lewis Hackett to Fred L. Soper Creator: Hackett, Lewis Date: 12 October 1955 Genre: Letters (correspondence)
5. Letter from Lewis Hackett to Fred L. Soper Creator: Hackett, Lewis Date: 12 January 1959 Genre: Letters (correspondence)
6. Letter from Fred L. Soper to Leonel Tavares Miranda de Albuquerque Creator: Soper, Fred Lowe, 1893-1977 Date: 24 August 1967 Genre: Letters (correspondence)
7. Letter from Fred L. Soper to Lewis Hackett Creator: Soper, Fred Lowe, 1893-1977 Date: 18 October 1955 Genre: Letters (correspondence)
8. Letter from Fred L. Soper to Paulo C. A. Antunes Creator: Soper, Fred Lowe, 1893-1977 Date: 22 August 1967 Genre: Letters (correspondence)
9. Letter from Fred L. Soper to Paulo C. A. Antunes Creator: Soper, Fred Lowe, 1893-1977 Date: 26 September 1968 Genre: Letters (correspondence)
10. Letter from Fred L. Soper to Lewis Hackett Creator: Soper, Fred Lowe, 1893-1977 Date: 20 January 1959 Genre: Letters (correspondence)
11. Letter from W. H. Crichton to D. Gordon Cheyne Creator: Crichton, W. H. Date: 24 December 1943 Genre: Letters (correspondence)
12. Letter from W. H. Crichton to D. Gordon Cheyne Creator: Crichton, W. H. Date: 23 December 1943 Genre: Letters (correspondence)
13. Letter from Lewis Hackett to Fred L. Soper Creator: Hackett, Lewis Date: 15 December 1939 Genre: Letters (correspondence)Poems
15. Letter from Fred L. Soper to Wilbur A. Sawyer Creator: Soper, Fred Lowe, 1893-1977 Date: 7 February 1944 Genre: Letters (correspondence)
16. Letter to the Editor: The American Journal of Tropical Medicine & Hygiene Creator: Soper, Fred Lowe, 1893-1977 Date: May 1969 Publisher: American Society of Tropical Medicine and Hygiene Genre: ArticlesLetters (correspondence)
17. Letter from Robert D. Murphy to Richard F. Allen and George K. Strode Creator: Murphy, Robert D. Date: 2 February 1943 Genre: Letters (correspondence)
18. Letter from Dudley A. Reekie to Fred L. Soper Creator: Reekie, Dudley A. Date: 30 August 1943 Genre: Letters (correspondence)
19. Letter from Fred L. Soper to Leon A. Fox Creator: Soper, Fred Lowe, 1893-1977 Date: 2 September 1943 Genre: Letters (correspondence)
20. Letter from Fred L. Soper to Dudley A. Reekie Creator: Soper, Fred Lowe, 1893-1977 Date: 16 September 1943 Genre: Letters (correspondence)
21. Letter from Henry Stimson to Fred L. Soper Creator: Stimson, Henry Date: 31 May 1943 Genre: Letters (correspondence)
22. Letter from Fred L. Soper to Eugene P. Campbell Creator: Soper, Fred Lowe, 1893-1977 Date: 6 October 1967 Genre: Letters (correspondence)
23. Letter from Fred L. Soper to Leona Baumgartner Creator: Soper, Fred Lowe, 1893-1977 Date: 20 May 1966 Genre: Letters (correspondence)
24. Letter from Leona Baumgartner to Fred L. Soper Creator: Baumgartner, Leona, 1902-1991 Date: 17 May 1966 Genre: Letters (correspondence)
25. Letter from Pedro Galindo to Fred L. Soper Creator: Galindo, Pedro Date: 18 May 1966 Genre: Letters (correspondence)
26. Letter from Pedro Galindo to Fred L. Soper Creator: Galindo, Pedro Date: 27 June 1966 Genre: Letters (correspondence)
27. Letter from Fred L. Soper to Pedro Galindo Creator: Soper, Fred Lowe, 1893-1977 Date: 24 May 1966 Genre: Letters (correspondence)
28. Letter from Richard F. Allen and George K. Strode to Robert D. Murphy Creator: Allen, Richard F.Strode, George K. Date: 15 January 1943 Genre: Letters (correspondence)
29. Letter from George K. Strode to Wilbur A. Sawyer Creator: Strode, George K. Date: 2 January 1943 Genre: Letters (correspondence)
30. Letter from Fred L. Soper to Wilbur A. Sawyer Creator: Soper, Fred Lowe, 1893-1977 Date: 7 July 1939 Genre: Letters (correspondence)
31. Letter from Wilbur A. Sawyer to Fred L. Soper Creator: Sawyer, Wilbur A. Date: 8 December 1942 Genre: Letters (correspondence)
32. Letter from Wilbur A. Sawyer to C. S. Stephenson Creator: Sawyer, Wilbur A. Date: 14 December 1942 Genre: Letters (correspondence)
33. Letter from C. S. Stephenson to Wilbur A. Sawyer Creator: Stephenson, C. S. Date: 9 December 1942 Genre: Letters (correspondence)
34. Letter from Fred L. Soper to Joseph E. Smadel Creator: Soper, Fred Lowe, 1893-1977 Date: 2 February 1962 Genre: Letters (correspondence)
35. Letter from Fred L. Soper to Wilbur A. Sawyer Creator: Soper, Fred Lowe, 1893-1977 Date: 23 November 1938 Genre: Letters (correspondence)
36. Letter from Fred L. Soper to Joseph E. Smadel Creator: Soper, Fred Lowe, 1893-1977 Date: 25 June 1961 Genre: Letters (correspondence)