Notable Loot posible error Edit
I didn't find a Stealth Boy in that safe. Probably random loot.
Also the second overdue book, that says is in a toolbox with the radiation barrels. I did not find one in the toolbox, generally anything in a container is random loot. Also that location is a construction zone INSIDE the vault i was looking through the outside construction zone for a good amount of time. Also the direction is more SW not SE.