- FondsMordell - Papers of Louis Joel Mordell
- Series1-40 - Letters
- File16 - Lubelski
- Item16.1 - A.L.s., in German, from Warsaw
- Item16.2 - T.L.s., in German, from Warsaw
- Item16.3 - T.L.s., in German, from Warsaw
- Item16.4 - T.L.s., in German, from Warsaw
- Item16.5 - T.L.s., in German, from Warsaw
- Item16.6 - T.P.s., in German, from Warsaw
- Item16.7 - T.L.s., in German, from Warsaw