Resource Type
Collection
Serial/Series Title
United States Bureau of Mines Reports
7
Report of investigations (United States. Bureau of Mines)
6
Farmers' bulletin (United States. Dept. of Agriculture)
3
United States Geological Survey Reports
3
15 Minute Series (Topographic)
2
Petroleum-Engineering Studies
2
Annual Report of Research and Technologic Work on Coal
1
Information circular (United States. Bureau of Mines)
1
Strategic minerals investigations
1
Trace elements investigations report
1
2 More