Original 1st printing 6&3/4 x 8&1/2" concert handbill for the Head West Rock and Roll Circus Dances featuring Mixed Blood and Jacob's Ladder at the Pythian Ballroom in Portland, Or on 10/31/1970 (Halloween Night.)  The back has ads for upcoming events and local businesses.
 
Art by Bruce Weber.
 
Handbill is in mint/near mint condition.