Letter to Cardinal Bernard Jan Alfrink, Archbishop of Utrecht and Military Vicar of the Netherlands, on the occasion of the international military pilgrimage to the Shrine of Lourdes (June 12, 1968)
Letter to the Cardinal Prefects of the Sacred Congregation for the Oriental Churches and for the Evangelization of Peoples on the 5th centenary of the death of George Kastrioti Skanderbeg (January 17, 1968)