1. Letter from J. R. Heller to John E. Fogarty Creator: National Cancer Institute (U.S.)Heller, J. R. Date: 21 January 1959 Genre: Letters (correspondence)
2. Memorandum from J. R. Heller to Leroy Burney Creator: National Cancer Institute (U.S.)Heller, J. R. Date: 29 September 1958 Genre: Memorandums
3. Letter from J. R. Heller to John E. Fogarty Creator: National Cancer Institute (U.S.)Heller, J. R. Date: 14 January 1959 Genre: Letters (correspondence)
4. Letter from J. R. Heller to John E. Fogarty Creator: National Cancer Institute (U.S.)Heller, J. R. Date: 22 April 1959 Genre: Letters (correspondence)