- FondsMordell - Papers of Louis Joel Mordell
- Series1-40 - Letters
- File6 - Erdos
- File6.1 - Letters
- 12 more...
- Item6.1.13 - T.L.s., from Budapest
- Item6.1.14 - T.L.s., from Budapest
- Item6.1.15 - T.L.s., from Budapest
- Item6.1.16 - A.L.s, from Budapest
- Item6.1.17 - T.L.s., from Budapest
- Item6.1.18 - A.P.s., from Budapest
- Item6.1.19 - T.L.s., from Budapest
- Item6.1.20 - T.L.s., from L. Erdos, Budapest
- Item6.1.21 - T.L.s., from L. Erdos, Budapest
- 31 more...