Heim, B. B. (1981). Heraldry in the catholic church: Its origin, customs, and laws (2. ed.). Van Duren.
Cita Chicago Style (17a ed.)Heim, Bruno Bernhard. Heraldry in the Catholic Church: Its Origin, Customs, and Laws. 2. ed. Gerrards Cross: Van Duren, 1981.
Cita MLA (8a ed.)Heim, Bruno Bernhard. Heraldry in the Catholic Church: Its Origin, Customs, and Laws. 2. ed. Van Duren, 1981.
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