indicateur de direction: 67 phrases in 11 subjects |
Aviation | 1 |
Communications | 2 |
Electronics | 3 |
General | 4 |
Law | 3 |
Life sciences | 3 |
Mechanic engineering | 1 |
Natural resourses and wildlife conservation | 3 |
Natural sciences | 1 |
Rail transport | 2 |
Transport | 44 |