Primary source: shelat.khoury.northeastern.edu/research/2003-02-01-remembrance_of_data_passed_a_study_of_disk_sanitization_practices/
Verified locator: Primary coauthor publication page verifies title, authors and IEEE Security and Privacy, January/February2003. Original paper mirror www.lifespantechnology.com/wp-content/uploads/2012/04/IEEEReportonDataPrivacy.pdf verifies printed byline Simson L. Garfinkel and Abhi Shelat, volume1(1),17–27; DOI10.1109/MSECP.2003.1176992. Pages24–26, Our experiment and conclusions:158 used drives, damaged/unreadable devices and explicit sample limitation. No population prevalence inferred.