The "Beach Boys": the definitive diary of America's greatest band: on stage and in the studio by Keith Badman
Backbeat Books October 2004
on Page 132:
Yankee Stadium Bronx, New York, NY Sound Blast '66 show, with Ray Charles (headliner), The Byrds, Stevie Wonder, Jerry Butler, The McCoys, The Marvelettes, The Gentrys, Cowsills, Guess Who. A less—than-sell-out crowd for this big event totals 9,000.