@book {794, title = {Katyn: A Crime without Punishment}, year = {2007}, publisher = {Yale University Press}, organization = {Yale University Press}, type = {Published Documentary Collection}, address = {New Haven}, editor = {Anna M. Cienciala and Natalia S. Lebedeva and Wojciech Materski} } @book {170, title = {Represje sowieckie wobec Polak{\'o}w i obywateli polskich}, year = {2002}, publisher = {O{\'s}rodek KARTA}, organization = {O{\'s}rodek KARTA}, address = {Warsaw}, author = {Stanis{\l}aw Ciesielski and Wojciech Materski and Andrzej Paczkowski} }