I think I can be of some help to you regarding the Gassner family.I have been working on my fathers side of the family and have only just begun to do something with the Gassner side of the family, so when I pulled up your message I was excited to see that I have some information that you may need. My mother's maiden name was Barbara Gassner and she has a sister Marion.Her father was Irving Gassner son of Louis and Chloe Irma Upton.You are correct there were six children, Irving (my grandfather) Harding, Louis, Evalyn, Keith and Kenneth (twins, though Keith died when he was two). They are all gone now, my grandfather passed away in 1989.My mother and her sister live here in Colorado and she has a couple of cousins she is in contact with. I do have a copy of a family tree that I think one of my mother's cousins worked on who has since passed away.
Let me know what information I can help you with and maybe you can help me with some.