Subject
- Belgium--Brussels3
- Botanists3
- Canada3
- Carver, George Washington, 1864?-19433
- Curie, Pierre, 1859-19063
- Elizabeth II, Queen of Great Britain, 1926-3
- Ghana3
- Inventors3
- Metric system3
- Monuments3
- Nuclear facilities3
- Offset lithography3
- Petroleum refineries3
- Röntgen, Wilhelm Conrad, 1845-19233
- Togo3
- Unesco3
- Arab Petroleum Congress2
- Arrhenius, Svante, 1859-19272
- Behring, Emil von, 1854-19172
- Biologists2