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- Indiana University2
- Science2
- Botanists --Correspondence.1
- Botany.1
- Bougainvillea1
- Corn --History.1
- Depressions--1934--United States1
- Evening primrose1
- Grasses.1
- Holocaust, Jewish (1939-1945)1
- Oenothera1
- Paraguayan War, 1865-18701
- Roses1
- Rubber plants1
- Sex discrimination against women1
- Trees --Identification.1
- World War, 1939-19451
- World War, 1939-1945--Science--Research1