RT Article T1 The Normative Status of the Catechism JF Periodica de re canonica VO 85 IS 1 SP 9 OP 34 A1 Barrett, Richard J. LA English PB Gregorian & Biblical Press YR 1996 UL https://www.ixtheo.de/Record/1637382774 K1 Katechismus K1 Verbindlichkeit