List of available sources?

[jimmiejackson414-zz]

Is there a list of available news sources? I'm trying to integrate a very specific set of US-based search results, but am unsure of what sources exactly I can draw from.

[RyanMilb]

I've also been searching for this

[FIFER-Mods]

Really weird, not sure why there isn't a list anywhere (and it's not conventional either, bbc and cnn work, but not nyt)