Resource Type
Collection
Serial/Series Title
15 Minute Series (Topographic)
10
30 Minute Series
9
United States Bureau of Mines Reports
8
Farmers' bulletin (United States. Dept. of Agriculture)
4
7.5 Minute Series (Topographic)
3
Technical paper (United States. Bureau of Mines)
3
Bulletin (Texas. Department of Agriculture)
2
Experiment Station Record
2
National Bureau of Standards Reports
2
United States Geological Survey Reports
2
18 More