In regard to all the books that were suggested, you may wish to check your local library first. Then
if they do not have them, there is an inter-library program but it will probably cost a small amount
of money. Since at least one of the books was first published in 1960, it may be your best bet on tracking
down the books.
The Family Library that the LDS (Mormons) runs is wonderful if you wish to go that route.
There is probably a branch somewhere near you. The Family Library in Salt Lake City is amazing.
But of course there are other places to look such as even this site.
Good luck in your search for more information.
Linda