Wow, so, looking through that book, it turns out that somebody in the county that borders the town where my dad and his partner had their sighting in 1973, also sighted a "nocturnal light" on Oct. 18th, 1973.
I wish the author had obtained more information on these sightings. It doesn't give a name of who was in the other county. But it also doesn't give my dad's name either. I showed the book to my mom the other day when she came up to visit, and I showed her that my dad's name wasn't listed. She said it was because he refused the authors offer to be listed. I also found out that when my dad was interviewed for the local article, he and his partner were also intervied by Dr. J. Allen Hynek.