Gannett Co. said its outdoor advertising division...

Gannett Co. said its outdoor advertising division has agreed in principle to acquire New York Subways Advertising Co. and related firms, including one in Los Angeles, for an undisclosed price . . . United Airlines said it flew 5.0 billion revenue passenger miles in February, up 4% from the 4.80 billion it flew during the same month in 1987 . . . British leisure group Rank Organization PLC, in another takeover of a U.S. firm by a British company, said it would acquire the entire business of the real estate firm Ahnert Enterprises for $183 million . . . The Federal Reserve said the average yield for one-year T-bills, the most popular index for making changes in adjustable rate mortgages held steady at 6.63% last week, the same as the week before.