Please follow https://unwritten-record.blogs.archives.gov/2020/01/23/researching-aerial-photography-of-the-united-states-rg-145-aerial-indexes-now-digitized/.

Please follow https://unwritten-record.blogs.archives.gov/2020/01/23/researching-aerial-photography-of-the-united-states-rg-145-aerial-indexes-now-digitized/.