Subject
- Science publishing57
- Hoff, J. H. van 't (Jacobus Henricus), 1852-191156
- Antisemitism55
- Ostwald, Wilhelm, 1853-193254
- Nazi concentration camps51
- Schnell, Alfred, 1900-194445
- Haber, Fritz, 1868-193444
- Condolence notes41
- Schnell, Eva, 1913-194441
- Publishers and publishing38
- Physicists37
- College teachers36
- Gurs (Concentration camp)36
- University of Michigan35
- Association of Oak Ridge Engineers and Scientists32
- Scientists32
- Tennessee Valley Authority31
- Thank-you notes31
- Jewish refugees30
- Miranda de Ebro (Concentration camp)30