This video evaluates the three main claims of The Book of Abraham and common defenses of these claims. All sources are listed on the relevant slides and at the end. All sources are from Church sponsored content.
This is a very good look at the Book of Abraham. I think it is far more likely that Joseph may have looked up the symbols and gotten a rough meaning and then just filled in the massive semantic gaps from his own knowledge. He then probably embellished a lot of things and then maybe believed his own embellishments.
