I am a Sister in the Family History Library and they have many missionaries plus professionals or cz as I call them Specialists who are there on certain days , if you are going to be in Salt Lake City, Utah I would heck and see and then sometimes they will give you an opinion to make cz an appointment to get one on one help.
If you go to floor B1 they will have someone to help you
Best thing to do is call them.
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