Ad: Indianapolis Star, June 3 or 10, 1973, p. unk, via David Davis. University of Cincinatti Office of Programs & Cultural Events Presents (Summer Rock! Outdoors!) Grateful Dead. Accompanyng pic includes Pigpen. Rain or shine. NB source is Indy Star via David Davis, and ad says "Tickets now on sale in Indianapolis". Rain or shine, $5 advance and $6 gate, all general admission.
Cxl: "Grateful Dead Off at Nippert," Cincinnati Inquirer, June 14, 1973, p. unk; B.W., "Grateful Dead Cancel Out At UC's Nippert Stadium," Dayton Daily News, June 15, 1973, p. 48. They had problems staging all of the Dead's gear, and the campus power plant was right behind the stage, creating noise and whatnot, per Sam Cutler. Thanks to Jesse Jarnow for these sources.