access is restricted to the library's reading rooms in Washington and Culpeper
Wasn't aware that their holdings were accessible in Culpeper. In fact, I was lead to believe it was the opposite.
To listen in D.C., you make a request and a digital version is prepared in about a week for you to listen to on their PCs. The digital copies, once they are made, are accessible for good anytime you want. It's a shame I don't get to spend as much time there as I would like, considering how close I am.
Bertrand.