Original 1st printing (Maron Litho credit) 17&3/4 x 23&1/4" concert poster for the Youngbloods appearing with Canned Heat and Merry-Go-Round at the Earl Warren Showgrounds in Santa Barbara, CA on 11/25/1967.
Art by Frank Bettencourt, image is featured in the Art of Rock book on page 269 (plate 3.47) and is part of the Jim Salzer Presents series.
Medium-thin flat vellum stock poster is in near mint to excellent (A-/B+ to B+) condition; there is a small 3/4" tear and a thin bend in the upper right margin, a few soft handling creases/light edge dings scattered around the image/outer margin area, otherwise fine.
Great-looking example of this late-'67 Jim Salzer poster from the AOR; check out a VERY informative list of 1960's-era shows (including this one) held at the Earl Warren Showgrounds HERE:
http://earlwarrenshowgroundsetal.blogspot.com/2010/09/earl-warren-showgrounds.html