Originally Posted by DrumEatDrum
It's not really plagiarism in Zepplins case because they gave Richie Vallens writing credit on the song.
The story goes Zep had heard Richie's mother hadn't gotten any money from his songs, so they borrowed the part, and gave Vallens credit to try to fund money into his estate that would hopefully go to his mother.
Thanks DED. I take back what I said about plagiarism of that song (Willie Dixon's are another matter). In this case it was a great thing they did!