Burrell Communications Group, Chicago, has acquired DFA Communications, New York, an agency specializing in direct marketing. "We're broadening our scope and taking advantage of our combined strength--ours in marketing to African Americans and DFA's to other key audiences," said Chairman-CEO Thomas J. Burrell. DFA, which will operate as a subsidiary, consists of DFA Advertising, DFA Printing & Mailing, Westchester Digital Imaging and AB Graphics. Burrell said current management will remain. DFA president Ed Forti founded the company nine years ago; the agency reports capitalized billings of $25 million. Burrell lists its capitalized billings at $90 million. The acquisition gives Burrell its first presence in New York, allowing the agency to pursue more business on the East Coast, Mr. Burrell said. Uniworld Group is currently the largest agency in New York targeting African-Americans, with billings of $104 million.