A rare copy of a report, alleging a U.S.-waged bacterial warfare targeting North Korea and China during the Korean War, was recently put up for auction by the film director who discovered it.

Those suspicious that the tactic had been employed during the war seized on the report, but it has thus far not created a consensus among the academic community.

On Tuesday the Yonhap News Agencycovered the auctioning of the report, entitled “Report of the International Scientific Commission for the Facts Concerning Bacterial Warfare in Korea and China.” The report, also known as the Needham Report, includes approximately