Newspaper and magazine publishers have been under unabated pressure to offset a decline in print advertising dollars by shoring up their digital business to attract advertisers and by boosting subscriptions. News Corp, controlled by media mogul Rupert Murdoch, said revenue at its news and information unit declined 8.1 percent in the second quarter. The unit, which accounted for about 65 percent of total revenue, also houses Dow Jones and the New York Post.