http://www.toledomuseum.org/exhibitions/the-psychedelic-60s-posters-from-the-rock-era
If you get a chance - go there for the exhibit.
Both Frank and I really enjoyed it. You could view the exhibit on many levels. Since I had just finished a design class at CCS I was interested in how they used pattern, lettering, color and balance to convey a message. Heard lots of comments from people "I remember that group....". They had a room of black light posters (remember those!!!), along with video playing of concerts from the 60s.
I particularly liked the posters by Victor Moscoso --- primarily the one for The Doors http://www.victormoscoso.com/doors.html
He had studied with Josef Albers who was an expert in color theory and I loved his use of old photos in many of his posters.
I also loved the posters of Bonnie MacLean who was one of the few female artist included. She always had a "disconnected" face in her posters.
Great nostalgic trip!