Subject
- Shellfish fisheries -- Oregon -- Management49
- Clam fisheries -- Oregon42
- Weeds -- Control40
- Herbicides38
- Agricultural experiment stations -- Research -- Oregon -- Jackson County37
- Agriculture -- Oregon -- Jackson County -- Field experiments37
- Entomology37
- Fish culture -- Oregon36
- Dungeness crab fisheries -- Oregon33
- Engineering31
- Dungeness crab fisheries -- Oregon -- Management30
- Fisheries -- Oregon30
- Game and game-birds -- Oregon25
- Game protection -- Oregon25
- Animal population density21
- Carcinus maenas -- Oregon21
- Introduced aquatic organisms -- Oregon21
- Crabbing -- Oregon20
- Clam fisheries -- Oregon -- Statistics19
- Wildlife management -- Oregon19