 |
| |||
| International Union for the Scientific Study of Population | |||
| International Population Union | |||
| Международный союз по проблемам народонаселения: 6 phrases in 2 subjects |
| Ecology | 1 |
| Economy | 5 |
|
| |||
| International Union for the Scientific Study of Population | |||
| International Population Union | |||
| Международный союз по проблемам народонаселения: 6 phrases in 2 subjects |
| Ecology | 1 |
| Economy | 5 |