Treesearch
Flying helicopters over mountains at night...guidance systems tested in 1965 phase of study
| Authors: | Ralph G. Johnston, Cal Ferris, James B. Davis |
| Year: | 1966 |
| Type: | Research Note |
| Station: | Pacific Southwest Research Station |
| Source: | Res. Note PSW-RN-126. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 8 p |
Download (PDF 2.09 MB): https://research.fs.usda.gov/download/treesearch/37900.pdf