It would help if you all would briefly describe the content of these websites.
Lib. Washington: Here
Center for Political Song Glasgow Caledonian Univ.: Here
CUFresno Trad. Ballad Index is in Links and used by most people here, but: Here
Most of us have a number of these bookmarked. We have forgotten what the "call letters" look like. The way you present them mean that we have to check them out one by one. Somebody else can look at the rest if they have the time. Until the name and purpose of the website is indicated--- even just the name as I have done for three--- we don't know whether the site is worth looking at, bookmarking or linking.