Most archives have (non employee, I think) researchers who know the system and can be hired to locate and copy information. It may be expensive but is probably worth it rather then spend a day with poor results. Plan ahead and prepare a list.
Most archives have (non employee, I think) researchers who know the system and can be hired to locate and copy information. It may be expensive but is probably worth it rather then spend a day with poor results. Plan ahead and prepare a list.