Unfortunately, I don't have any leads on Bertha's possible marriage record. But I was looking into her uncommonly-named (score!) Abelisky/Abilistky/Ablisky relatives as a kind of lateral move to help you find your way backwards.
She was in Elmira, NY, Pennsylvania, and Cleveland, OH, before settling in Colorado. I see that there were Abelisky families living in several of those places. I would build out the trees from those folks and look to newspaper records to flesh out their relationship to Bertha and one another. Chasing any of them backwards could possibly lead you back to Bertha in some other place or archive that doesn't seem obvious right now.