...and Jimmy Page did actually lift some of Joan Baez's fingerpicking riffs for Zep's recording of "Babe I'm Gonna Leave You" (which she recorded years before Zep) Zep's first album is an absolute classic and a must for any serious collector of hard rock. (I was also a very big Humble Pie fan as well...but shhsh...don't tell anyone! :-)
(Sorry for the thread creep.)