Letter of Fr. Paolo Albera written in Italian on the inauguration of the monument of Blessed Don Bosco. The letter was written on the 6th April 1920 – the 10th anniversary since the death of Don Rua.

ACTS of the General Council of the Salesian Society of St John Bosco. N. 321. April – June 1987. Letter of the Rector Major, Fr Egidio Vigano.

Letter to Past Pupils and Friends of Don Bosco in Malta and Gozoon the celebration of the 150th Anniversary of the foundation of our Movement on the 24th June 1870