"Hitler’s Central European Empire : 1938-1945 / J.W. Sedlar. – 2007. – p. 84" . "Obrana Národa was a Czech resistance underground organization, founded by military officers of the Czech army. The aim of Obrana Národa was to prepare for a national uprising if a European war broke out. In the meantime its leaders sought to establish a clandestine intelligence network at home and a Czech military force abroad."@eng . "Obrana Národa"@eng . .