Non-Casey radio countdowns

[edisonlite]

I’m trying to determine info for most of the national radio countdowns that aired (specifically what years each ran, and which chart was used for the countdown). I used the Charis Music site and Wikipedia as a basis (and some googling). Can anyone help fill in the blanks (and correct any wrong info)?

I've asked similar questions on other threads but I'm trying to keep to the listed subject matter, and "General Music Discussion" seemed the place for this.

All are NON-CASEY shows:

Weekly Music Magazine (Charlie Van Dyke) - 1/9/82-12/25/02 - chart basis? (I got the info for its predecessor Weekly Top 30 with Mark Elliot.)
National Music Survey (hosted by Bill St. James & Charlie Tuna after Clark) - '85 until ? - R&R AC
(I already have the Dick Clark years)
Countdown America (Dick Clark & other hosts) - 83? to when? - R&R but which chart?

Are there other Dick Clark radio countdowns from the '80s or '70s that I'm forgetting?

Thanks for your help!