Topic
- Irrigation 2
- Oregon State University. Extension Service 2
- Race relations 2
- Sewage 2
- Soils 2
- Urbanization 2
- Water quality 2
- Water-supply 2
- Zionism 2
- Al-Wehda Dam (Jordan) 1
- Ba'athism 1
- Baghdad (Iraq) 1
- Barracks 1
- Child welfare--Oregon 1
- College Inn 1
- Concentration camps 1
- Contamination of environment 1
- Dormitories 1
- Electricity 1
- Fundamentalism 1
