- FondsMordell - Papers of Louis Joel Mordell
- Series1-40 - Letters
- File28 - Siegel
- 2 more...
- Item28.3 - A.L.s., in German, from Frankfurt
- Item28.4 - A.L.s., in German, from Frankfurt
- Item28.5 - A.L.s., in German, from Frankfurt
- Item28.6 - A.L.s., in German, from Frankfurt
- Item28.7 - A.L.s., in German, from Frankfurt
- Item28.8 - A.L.s., in German, from Frankfurt
- Item28.9 - A.L.s., in German, from Berlin
- Item28.10 - A.L.s., in German, from Frankfurt
- Item28.11 - A.L.s., in German, from Frankfurt
- 8 more...