USGS B 263
Title:Methods and costs of gravel and placer mining in Alaska
Publisher:U.S. Geological Survey
Ordering Info:USGS Publications Warehouse
Purington, C.W., 1905, Methods and costs of gravel and placer mining in Alaska: U.S. Geological Survey Bulletin 263, 263 p.
- b0263.pdf (44.0 M)