Subject
- Assaying -- Oregon1
- Caves -- Oregon -- Malheur County1
- Chrysotile -- Oregon -- Grant County1
- Geology -- Oregon1
- Geomagnetism -- Pacific Coast (U.S.)1
- Gold ores -- Oregon -- Grant County1
- Lava tubes -- Oregon -- Malheur County1
- Minerals -- Economic aspects1
- Mines and mineral resources -- History1
- Mining law -- Oregon1
- Ocean mining1
- Pumice1
- Submarine geology1