Forms part of the Claims Conference International Holocaust Documentation Archive at the United States Holocaust Memorial Museum. This archive consists of documentation whose reproduction and/or acquisition was made possible with funding from the Conference on Jewish Material Claims Against Germany. Source archives is the Central State Archives (︠S︡entralen dŭrzhaven arkhiv ), Bulgaria. The United States Holocaust Memorial Museum Archives received the filmed collection via the United States Holocaust Memorial Museum International Archives Project in July 2002 and accretion in 2017.