She taught courses in Eastern European history , with a focus on modern Polish and Russian history , at the University of Ottawa and the University of Toronto in Canada , before landing a long-term career in the U.S. at the University of Kansas in 1965 . As an author , Cienciala published two books , edited four books and wrote around forty academic articles in various American , German , and Polish historical journals . She retired as Professor Emeritus in June , 2002 . In 2007 Cienciala published , together with two other historians , '' A Crime without Punishment '' , which explores the historiography of the Katyn massacre
Katyn massacre
Katyn massacre
Anna M. Cienciala