On this day in 1974, the Eagles, Deep Purple, Emerson, Lake & Palmer and Black Sabbath played at the first Cal Jam at the Ontario Motor Speedway (about where you'll find the Ontario Mills outlet mall today). Were you there?
Canned Heat Vintage Concert Poster, Avalon Ballroom (San Francisco, CA) Nov 3, 1967 (FD090-PO). Art by Bob Fried and Grant Jacobs. http://www.wolfgangsvault.com/canned-heat/poster-art/poster/FD090.html