EDITOR & PUBLISHER: Circulation at many of the country’s largest newspapers continued a steep slide as the Audit Bureau of Circulations Monday morning released the latest figures for the six months ending September 2009 — proving yet again that the industry can’t shake the dramatic declines that have taken hold over the past several years. On a comparable basis, ABC reported that for the 379 newspapers filing with the organization, average daily circulation plunged 10.6% to 30,395,652 — one of the most severe drops in overall circulation. The Philadelphia Inquirer currently ranks 10th nationwide with a daily circulation of 361,480. […]