This NYT article from 1977 may be of use (it has a lot of typos from being digitalized it seems)
https://www.nytimes.com/1977/12/26/archives/worldwide-propaganda-network-built-by-the-cia-a-worldwide-network.html
maybe this could be useful?
https://universityofleeds.github.io/philtaylorpapers/vp011dae.html
Honestly, the wikipedia entry has some good sources, as well as a link to the music video: https://en.wikipedia.org/wiki/Radio_Free_Europe_(song)
Fair, and I only did it because it's one of my favorite REM songs. Are you only doing RFE? There may be sources covering the other stations, too.
Wilson Center has an archive of declassified docs on it: https://digitalarchive.wilsoncenter.org/collection/104/radio-free-europe-and-radio-liberty
Virtually every state-media outlet now (including the current Radio Free Europe outlet) claims editorial independence, regardless of all the evidence to the contrary.
For example, Radio Free Europe, Radio Free Asia, Open Technology Fund, Voice of America, Current Time TV, Alhurra, Radio Sawa, and Radio Televisión Martí are all part of the US Agency for Global Media (formerly known as the Broadcasting Board of Governors), which requires its outlets through its top broadcasting standards to be “consistent with the broad foreign policy objectives of the United States” along with its broadcasting principle of “The capability to provide a surge capacity to support United States foreign policy objectives during crises abroad”.
USAGM’s CEO is appointed by the U.S. President. The current CEO is Kelu Chao, who was appointed by Biden and has been reinstalling many of the USAGM executives at Radio Free Asia and Radio Free Europe that were purged by the former CEO Michael Pack (Trump’s appointee).
yasha.substack.com/p/part-one-a-portrait-of-a-soviet-cia
yasha.substack.com/p/weaponized-immigrants-and-the-history
yasha.substack.com/p/part-two-setting-up-the-cias-radio