Jerry Haendiges logs (not updated for many years, but still a good start for research projects) https://otrsite.com/radiolog/index.html RadioGoldindex https://radiogoldin.library.umkc.edu/ Magazine and pulp index (great for finding original writer citations for stories adapted for radio) http://www.philsp.com/homeville/cfi/0start.htm World Radio History (for magazine searches and downloadable books; Billboard magazine collection is superb) https://www.worldradiohistory.co