Subject
- Gold2
- Gold -- Assaying2
- Gold -- Economic aspects2
- Gold mines and mining2
- Silver -- Assaying2
- Archaeology -- Alaska -- Dyea1
- Cities and towns -- Oregon -- Pacific Coast1
- Copper -- Nevada -- Yerington1
- Copper -- Panama1
- Copper -- Peru -- Yanacocha1
- Crater Lake (Or.) -- Bathymetric maps1
- Cyanide process1
- Deep level transient spectroscopy1
- Diodes, Semiconductor -- Evaluation1
- Dredging -- Idaho -- Elk City -- History1
- Dredging -- Idaho -- Elk City -- Remote sensing1
- Dyea (Alaska) -- Antiquities1
- Electron spectroscopy1
- Fishes -- Effect of metals on -- Peru -- Madre de Dios (Dept.)1
- Fishes -- Mercury content -- Peru -- Madre de Dios (Dept.)1