Verdadera paz y seguridad : ...¿de qué fuente? - New York : Watchtower Bible and Tract Society of New York : International Bible Students Association, 1973 - 190 p. : il. ; 17 cm Tít. orig.: True peace and security, from what source? Subjects--Corporate Names: Testigos de Jehová--Doctrinas Universal Decimal Class. No.: 289.954