Quoted from o-din:
For those that are calling Zep a rip-off band, they never denied being strongly influenced by Robert Johnson, Muddy Waters, etc. They were just one of the first. All rock and roll is stolen one way or another. Just think how many times Led Zeppelin has been borrowed from.
They were a total rip off.
Anyone who has the orig vinyl can see that they credited the songs to Page/Plant.
Many lawsuits later, the credits on the CDs now read the actual bluesmen who wrote the songs.
Can't have better evidence than losing court case after court case, can you?
Babe I'm Gonna Leave You: Joan Baez - Babe I'm Gonna Leave You (Anne Brendon)
Dazed and Confused: Jake Holmes - Dazed and Confused
Black Mountain Side: Bert Jansch - Black Water Side
How Many More Times: Howlin Wolf - How Many More Years / Albert King - The Hunter/ (riff from Les Fleurs de Lys: Tick Tock)
Communication Breakdown: Eddie Cochran - Nervous Breakdown
Your Time Is Gonna Come: Traffic - Dear Mr. Fantasy
Led Zeppelin II:
Whole lotta love: Muddy Waters (Willie Dixon) - You Need Love / Small Faces - You Need Loving
Lemon Song: Howlin' Wolf - Killing Floor / Robert Johnson - Travelling Riverside Blues
Moby Dick: Bobby Parker - Watch Your Step
Bring it on Home: Sonny Boy Williamson - Bring it on Back
Led Zeppelin III:
Since I've Been Loving You: Moby Grape - Never
Hats Off: Bukka White - Shake 'em on Down
Gallows Pole: Leadbelly
Led Zeppelin IV:
Stairway to Heaven: Spirit - Taurus
Custard pie: Sleepy John Estes - Drop Down Mama
In my time of dying: Bob Dylan - In my time of dying (Blind Willie Johnson)
Nobody’s Fault But Mine: Blind Willie Johnson - Nobody’s Fault But Mine
Hey Hey What Can I Do?: Little Richard - Sunday Girl