Hank:
This is a great, public-spirited idea to help with a little cataloging to render an excellent Langley collection more accessible.
A lot of classic aeronautics books ands reports from the NBS (called NIST since the 1980s) library were discarded for want of space. Good that Langley has a collection of NBS studies-NBS did a lot on aviation technology from 1916-1922 on testing for example, the original Liberty engine, early aviation instruments and all sorts of aviation and av engine construction materials.
There was an NBS Technology Committee that toured European aerodromes in 1916-1917 to collect data on state of the art aviation technology for the US Government. I haven't been able to track the details (who, when and where they went), but I'd be pleased to hear from anyone with some leads.
There is an interesting collection at NIST library called "NBS War Work", a synopsis of all the tech work done at NBS during that period.
-pete