Original 1st printing 8&1/2 x 11" concert flyer for the Youngbloods appearing with the Sons of Champlin and Sparrow at the Avalon Ballroom in San Francisco, CA from 12/16-17/1966.
 
 Art by Stanley Mouse and Alton Kelley, image is # 39 in the Family Dog/Avalon series.
 
 Thin flat stock flyer is in excellent (B+) condition; aside from a nearly-invisible thin diagonal bend extending from the upper left margin going down through "Sparrow" (about 4-5" long) and a stray soft pinch ding or two, it is an EXCEPTIONALLY nice-looking example of this always-popular late-'66 Mouse/Kelley Avalon flyer.