I remember these from somewhere long ago -- maybe from a teen magazine?
I finally got a chance to look them up and they were published in 16 Spec in 1968. Some of the same as well as a few different photos from the same shoot were also published in the Daytime section of TV Picture Life, in Daytime TV, and in AfterNoon TV, all in that same year.
Of course, one day members will hopefully have the chance to see all four articles when the Members' Archive reopens and they get posted there.
Though I wouldn't hold your breath that it'll be any day soon.
(At the rate SMF issues upgrades to the system, I may be doing them and only them for the rest of my life.
)