 |
| size distribution curve: 14 phrases in 5 subjects |
| Construction | 3 |
| Cultural studies | 1 |
| General | 2 |
| Mining | 7 |
| Natural resourses and wildlife conservation | 1 |
|
| size distribution curve: 14 phrases in 5 subjects |
| Construction | 3 |
| Cultural studies | 1 |
| General | 2 |
| Mining | 7 |
| Natural resourses and wildlife conservation | 1 |