group leader: 21 phrases in 14 subjects |
Astronautics | 1 |
Aviation medicine | 1 |
Business | 1 |
Christianity | 1 |
Computer networks | 1 |
Economy | 2 |
General | 2 |
Geophysics | 1 |
Makarov | 3 |
Mass media | 1 |
Military | 3 |
Quality control and standards | 1 |
Security systems | 2 |
Telecommunications | 1 |