An amazing resource - thousands and thousands of weekly surveys from stations across America and the world, Fifties, Sixties, and beyond.

Great place to get chart information, with various search and browsing options.

A great resource that blends various chart data, with wonderful features such as artist popularity "score", summary of artist's top hits and US ranking, etc.

The Reel Top 40 Radio Repository - more airchecks that you can imagine. There's a small annual fee needed to play the airchecks.

If you have a library card and your library or an affiliate where you have been authorized is a freegal member, then you can register and download five songs a week, truly free and legal, and stream for a limited number of hours. Catalog is not all that complete, but good enough that I have legally added hundreds of original oldies to my music collection for free.

Not only can you find the original version of just about any oldie, but there are plenty of airchecks, DJ profiles, jingles, commercials, station histories, etc.