. . . . "Ballard, Robert" . . . . . "Robert Duane Ballard" . . . . . . . "1942" . . "Dr. Bob Ballard" . "Dr Robert Ballard" . . . . . . "Dr. Robber Ballard" . . . "Robert Ballard" . . . . . . . . . . . . . . "Dr. Ballard" . . . "Robert (Bob) Ballard" . . "Dr. Robert D. Ballard" . . . . . . . . . . "Robert D. Ballard" . . . . . "Dr Robert D Ballard" . . . . . "Dr. Robert Ballard" . . . . "Bob Ballard" . . . . . . . . . . . . . . . . . . . "Dr. Robert D. Ballard's" . "Robert Ballard" . "1942-06-30" . . . "Robert D. Ballard, Ph.D." .