Ah, the good old days. Four noteworthy acts on one bill, and the ticket was probably $5 or less. Quicksilver Messenger Service in their pre-Dino Valente mighty prime, Van freaking Morrison around the time of 'Astral Weeks', Blue Cheer blowing the roof off in their "Summertime Blues" commercial prime (they did more varied and interesting music a few albums later), and Clear Light, a very good, very interesting L.A. group with the eerie but thought-provoking "Mr. Blue". Sigh. Also a very cool poster!