An interesting project to gather UFO data is Project 1947, which looks to comprehensively document the 1947 UFO wave, as well as other significant moments in UFO history:
PROJECT 1947, with its primary focus on the 1947 wave, will also look forward as far as 1965 and back to 1900 for certain selected significant topics in UFO research. The 1900-1946 period will be examined for UFO-like reports.
There are various research catalogues also available from the website which make for interesting reading. Project 1947 is always looking for volunteers in surveying old newspaper reports and the like, so if it sounds like your kettle of fish, why not drop them a line.