LAWRENCE, Kan. (AP) — A 1945 report proving that Japan had government-controlled brothels during World War II has been added to a University of Kansas library.

Longtime university history professor Grant Goodman was a 20-year-old second lieutenant in the Army’s Military Intelligence Service when he translated the report about the brothels — some featuring enslaved “comfort girls” from across Asia.

The Lawrence Journal-World reports that decades later and before his 2014 death, Goodman shared the document with the world in an article. The attention is credited with contributing to Japan’s 1993 formal apology to former prostitutes now known as “comfort women.”

Just last month, Japan for the first time pledged government money — $8.3 million — to a foundation supporting the few remaining sex slaves from Korea, now in their 80s and 90s.