dispersion : 54 phrases in 13 subjects |
Acridology | 1 |
Agriculture | 1 |
Antennas and waveguides | 11 |
Climatology | 1 |
Electronics | 5 |
Environment | 2 |
Geography | 2 |
International Monetary Fund | 5 |
Mathematics | 16 |
Pest control | 1 |
Radio | 1 |
Statistics | 7 |
Vacuum tubes | 1 |