"Led Zeppelin"-- Moon or Entwistle?

[Scott Swanson <swandwn@agora.rdrop.com>]

I was just wondering if any of you hardcore Who fans could shed some 
light on the story of Who Named Led Zeppelin?  

The basic story is that "Going down like a lead zeppelin" was a favorite 
catch phrase of Moon's, and Jimmy Page decided to use it as the title 
of a band.  However, John Entwistle claims that the phrase may have been 
Moon's, but the idea to name a band after it was all Entwistle's.

Well, which is the real story?

Thanks,

Scott
(swandwn@agora.rdrop.com)