Hi, Steve.
If it's 50s it will either be "Time and Tune", or "Singing Together, with Rhythm & Melody".
In most cases we already have the contents listed (in chronological order) at one of these two links:
Time & Tune Contents
Singing Together Contents
If it's not on those lists then please list the contents (here or there).
If the contents aren't already listed then it's one of the few from the 1950s that I'm missing.
Cheers!