A broad subject book that does cover a number of UFO sightings and encounters in the upstate areas of New York. Out of print, it is still available from specialty book sellers. They carry a wide selection, and the monthly catalogue provides brief, informative descriptions of the titles. It is your personal means of collecting useful information about your own area. Check your library for recent and historical activity.
Many libraries carry an indexed hard copy for a number of years for a paper in the county.
Usually a check under 'UFO' or 'Unidentified Flying Object' or 'Flying Saucer' in indexes from around the fifties with return a number of entries that can then be retrieved from microfiche. Check your state library online index of which papers are available on microfiche in your county. Pick a month of known activity for your area. Most papers carried several accounts in the summer of 1947, especially in July just after the Arnold sighting. Check the compilation for activity in your county, then use that as a reference to check the local papers for accounts.