Well, Sweetheart, here's one listing, though it is a 1936 edition; I'm thinking it isn't likely to be the one you mean, but it's the first one I've come to that wasn't the 1999 one.
http://www.hoover.archives.gov/giftshop/Booksvideos/books-videos.htm

Hmm--here's one, same year, but says it's 35 min., where the above one said 20.
http://www.facets.org/movies/6690

There's a guy who has a column that appears in our Saturday paper: The Incredible Inman, I think is the name of the column. If you have him, or someone like him, in your paper, I suggest you write and ask. This guy can come up with the right movie when people write little more than, "I remember that I saw this movie in about 1955; there was a lady, dark-haired or maybe blonde, who did something with some man". I'll bet he could find your documentary!