Alfie called this a 'Pepsid' as a jingle that is so hard to forget it furnishes protection against telepathic eavesdropping. Of course in today's world, nobody wonders "where the yellow went!"
Just got home from work, and bought TSMD for the Kindle. There, on the first page of Chapter One, is Gully’s ditty, and by golly, the word is “nation”, not “station”. Your memory is clearly better than mine.
Now I get to reread the book, after 30-some years. Still plan to pick up a paper copy next time I see one, though.