• Letter Litteris, quibus (January 18, 1918)
  [Italian]

• Letter Admodum delectarunt (February 25, 1918)
  [Italian]

• Letter In Maximis (April 25, 1918)
  [Italian]

• Letter Salesiani Instituti (May 12, 1918)
  [Italian]

• Letter Maximas Inter (May 22, 1918)
  [Italian]

• Letter Dum tanta populorum (June 4, 1918)
  [Italian]

• Letter Litteris Apostolicis (June 7, 1918)
  [Italian]

• Letter Nel grave periodo (October 15, 1918)
  [Italian]

• Letter Animus Tuus (October 16, 1918)
  [Italian]

• Letter Dopo gli ultimi (November 8, 1918)
  [Italian]

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