Collection
Serial/Series Title
NACA Technical Memorandums
47
NACA Technical Notes
26
Farmers' bulletin (United States. Department of Agriculture)
12
United States Bureau of Mines Reports
9
NACA Aircraft Circulars
7
NACA Technical Reports
5
Farmers' bulletin (United States. Dept. of Agriculture)
4
Report of investigations (United States. Bureau of Mines)
4
Bulletin (United States. Bureau of Mines)
2
Bulletin (Texas. Department of Agriculture)
1
9 More