And these are the words with which Lehrer introduced the song (copied and pasted from a Lehrer page):

A considerable amount of commotion was stirred up during the past year over the prospect of a multilateral force, known to the headline writers as MLF. Much of this discussion took place during the baseball season, so the Chronicle may not have covered it, but it did get a certain amount of publicity; and the basic idea was that a bunch of us nations, the good guys, would get together on a joint nuclear deterrent force including our current friends, like France, and our traditional friends, like Germany. Here's a song about that, called the MLF Lullaby:

Wolfgang