Letter to Msgr. Hugo Aufderbeck for the 7th centenary of the Church of St. Severus (September 28, 1978) [English, Latin, Portuguese, Spanish] Letter to the Bishops of the Episcopal Conferences of Argentina and Chile (September 20, 1978) [Spanish] Letter on the occasion of the 85th German Katholikentag (September 17, 1978) [Portuguese, Spanish] Letter to Card. Joseph Ratzinger, Pontifical Legate at the Marian Congress of Ecuador (September 1, 1978) [English, Latin, Portuguese, Spanish]