There are any number of pre war documents that would be great to find

For me I think the 2070 census would be illuminating. The Fallout world seems so much, um, smaller that this world. After seeing California, Wahington DC, Lost Wages Nevada, and now Boston I'd guess the prewar population of the USA was maybe 25,000,000 or maybe less.

The Vault Tech incorporating docs would also be interesting to read.