| |||
Pleistocene-Holocene; post-tertiary; quaternary; recent | |||
fourth |
quaternario : 36 phrases in 9 subjects |
Agriculture | 8 |
Chemistry | 1 |
Communications | 3 |
Construction | 2 |
Earth sciences | 2 |
Economics | 1 |
Electronics | 16 |
Information technology | 1 |
Power lines | 2 |