Mr. Hoge has threatened to close or sell the paper unless the newspaper obtains $70 million in annual savings.
The decision came after an alternative newspaper, Willamette Week, obtained most of the documents for an article published last week.
The newspaper obtained the engine and chassis numbers of the vehicles, together with the dates they were bought.
The article said the newspaper had obtained the summary on Monday.
But most American newspapers have only recently obtained the equipment that make photograph alteration easy to perform and hard to detect.
The newspaper had obtained a copy of the tape.
He said revenues might reach $500 million after several years if the newspaper could obtain a circulation of one million.
It was unclear tonight how the newspaper obtained the tapes.
Mr. Knox said he did not know how the newspaper had obtained the memorandum.
They were published in The News and Observer here Saturday after the newspaper obtained a copy of the book jacket.