(Similar errors occurred in more than a dozen earlier articles, dating to July 2001).
A team of USA Today journalists read about 720 of Mr. Kelley's articles dating from 1993 and examined closely about 150.
The magazine made its archive, consisting of 4,300 issues and 300,000 articles dating back to 1923, available free through www.time.com last month.
One of the first residents, Michael Schober, is the building's unofficial historian; he became fascinated with the story of the home and filled a binder with news articles dating to the mid-1800s.
Kelley Smith Tunney, a spokeswoman for The A.P., said yesterday that the earlier questionable sources, named in articles dating back to January 2000, went undiscovered because the quotations involved were "innocuous" and tangential.
Bell & Howell, based in Ann Arbor, Mich., will put Post articles dating back to 1877 on the Web and will distribute them to libraries and other institutions, the companies said.
But the more important disclosure is reserved for the Afterword, where Mr. Lewis confirms what the reader already suspects, that the book is really a compilation of lectures and articles dating from 1980 to 1999.
Through Nov. 19, "Breaking News: How the Associated Press Has Covered War, Peace and Everything Else," an exhibition of photographs and articles dating to the mid-1800s; Mondays through Saturdays, noon to 6 p.m., in the exhibition hallway off the main lobby; (212) 817-2005; free.
The researcher, Dr. Scott S. Reuben, an anesthesiologist in Springfield, Mass., who practiced at Baystate Medical Center, fabricated data in some or all of the 21 journal articles dating from at least 1996, said Jane Albert, a spokeswoman for Baystate Health.
The articles date from October 1986 to December 2015.
