Nowadays we'd use the term viral, as in "This went viral," but back then things like this were just copied and shared, until more or less everyone everywhere had them. So it's quite possible that this song sheet of Halloween "Pumpkin Carols" is the exact same sheet that we had in school in Minneapolis; and if not the same, then very much like what we had.
Pumpkin Carols, of course, come from the Peanuts cartoon It's the Great Pumpkin, Charlie Brown, and, like A Charlie Brown Christmas, it was popular right away. Hallmark came out with a book of Pumpkin Carols, which I suspect is where this came from, again back in the day where plagiarism wasn't that serious if you didn't profit by it. Anyway, here are some that I remember quite well - do they seem familiar to you? If so, you might want to click on that link above and look at all of them - and maybe get together tonight with your friends and sing some. I'll be looking out the window, waiting for the Carolers to come.