Resource Type
Serial/Series Title
United States Geological Survey Reports
4
U.S. Geological Survey bulletin
3
Strategic minerals investigations
2
United States Bureau of Mines Reports
2
Contributions to economic geology
1
Farmers' bulletin (United States. Dept. of Agriculture)
1
Information circular (United States. Bureau of Mines)
1
Report of investigations (United States. Bureau of Mines)
1
U.S. Geological Survey professional paper
1