Words from Unity - anyone remember these PSAs?

Yep, remember them very well. Always thought they sort of encapsulated the look and feel of early-to-mid-1970s television. The film stock, the music, the tone, etc. Just the type of thing you'd see during a commercial break while watching a rerun of "Mayberry RFD." I remember Art Linkletter often being a presenter. Didn't know they lasted on into the late-70s or even 1980s. I don't recall ever seeing any that late.