This card 1983
http://boxrec.com/show_display.php?show_id=2291
DeWitt-Reed was scheduled for 10 rounds
St. Gordon vs. Jessie Burnett was scheduled for twelve rounds not fifteen according to the ring announcer who said "12" twice and the referee told the fighters 12 rounds during the instructions.
I uploaded the announcement for the DeWitt-Reed fight and the announcement and referee's instructions for the Gordon-Burnett for you to confirm.
http://www.youtube.com/watch?v=dBAsUpEq89s