Brötzmann, van Hove & Bennink - "Einheitslied"

Recorded February 4, 1974 at the Norddeutscher Rundfunk Jazzworkshop held at the NDR Funkhaus in Hannover, DE, featuring Peter Brötzmann (reeds), Fred van Hove (prepared piano, percussion), and Han Bennink (drums, percussion, reeds).

Peter Brötzmann official site
Fred van Hove on Wikipedia
Han Bennink on WIkipedia