Subject
- Highway research -- Congresses2
- Road construction -- Congresses2
- Ability1
- Agriculture1
- Agriculture -- Oregon1
- Animal industry1
- Antibiotics1
- Aphids as carriers of disease1
- Baking1
- Bean yellow mosaic virus1
- Beans -- Quality1
- Beans -- Yields1
- Bread1
- Dough1
- Economics -- Societies, etc.1
- English language -- Orthography and spelling1
- Feeds1
- Flour1
- Forests and forestry -- Northwest, Pacific1
- Gladiolus -- Diseases and pests1