- FondsMordell - Papers of Louis Joel Mordell
- Series1-40 - Letters
- File17 - Mahler
- 18 more...
- Item17.19 - T.L.s., from Groningen
- Item17.20 - T.L.s., from Groningen
- Item17.21 - T.L.s., from Krefeld
- Item17.22 - T.L.s., from Krefeld
- Item17.23 - T.L.s, from Krefeld
- Item17.24 - T.L.s, from Krefeld
- Item17.25 - T.L.s, from Krefeld
- Item17.26 - T.L.s, from Krefeld
- Item17.27 - A.L.s., from Krefeld
- 15 more...