Topic
- Finance 7
- College buildings 6
- Soviet Union 6
- Weather 6
- Armed Forces 5
- Football 5
- Jordan 5
- Rivers 5
- Soils 5
- Water quality 5
- Water-power 5
- Demography 4
- Dormitories 4
- Drainage 4
- Eshkol, Meir, 1924- 4
- International regimes 4
- King Abdullah Canal (Jordan) 4
- Rain and rainfall 4
- Bibliography 3
- Coasts--Oregon 3