Subject
- Irrigation farming5
- Child rearing3
- 4-H clubs2
- Child development2
- Agriculture -- Economic aspects -- Data processing -- Congresses1
- Discipline of children1
- Electric motors1
- Electric utilities -- Costs1
- Farm management -- Data processing -- Handbooks, manuals, etc1
- Fresh water -- Study and teaching -- Oregon1
- Irrigation -- Equipment and supplies1
- Irrigation -- Equipment and supplies -- Inspection1
- Irrigation -- Management1
- Irrigation farming -- Power supply -- Finance1
- Irrigation pumps1
- Irrigation pumps -- Maintenance and repair1
- Irrigation scheduling1
- Marine sciences -- Study and teaching -- Oregon1
- Microcomputers -- Handbooks, manuals, etc1
- Oceanography -- Study and teaching -- Oregon1