Together, the sources emphasize that the “Holocaust by bullets” was a central part of the Holocaust and that many victims and killing sites remained less well known because the murders often took place at local sites rather than in large, purpose-built extermination camps.<ref name="WW2Museum" /> | Together, the sources emphasize that the “Holocaust by bullets” was a central part of the Holocaust and that many victims and killing sites remained less well known because the murders often took place at local sites rather than in large, purpose-built extermination camps.<ref name="WW2Museum" /> |