Subject
- Agriculture -- Economic aspects -- Mathematical models9
- Economics, Mathematical3
- Oregon -- Economic conditions -- Mathematical models3
- Agricultural machinery2
- Agriculture -- Economic aspects2
- Economic development -- Mathematical models2
- Forest management -- Mathematical models2
- Forests and forestry -- Economic aspects2
- Water resources development -- Northwest, Pacific2
- Agricultural conservation -- Economics aspects1
- Agricultural ecology -- Oregon -- Malheur County -- Mathematical models1
- Agricultural machinery -- Maintenance and repair1
- Agricultural systems -- Oregon -- Malheur County -- Mathematical models1
- Agriculture -- Economic aspects -- Oregon -- Malheur County -- Mathematical models1
- Agriculture and state -- Oregon1
- Alternative agriculture -- Oregon -- Malheur County -- Mathematical models1
- Anadromous fishes -- Economic aspects -- Mathematical models1
- Auctions -- Mathematical models1
- Automobile parking -- Economic aspects -- Mathematical models1
- Beef cattle -- Economic aspects -- Northwest, Pacific -- Mathematical models1