44 An equally useful service is the dissemination of timely publications. It is scarcely necessary for Us to dwell at length on this point, for everyone knows how effectively newspapers, magazines and reviews can be employed either to present truth and virtue in their proper light and inculcate them deeply upon men, or to expose fallacies masquerading under the guise of truth, or to refute certain false opinions which are hostile to religion, or which do great spiritual harm by distorted presentation of vexed social questions. Hence We warmly commend those Bishops who interest themselves in the widest possible distribution of printed works of this sort which have been carefully edited. Though much has already been done in this regard, much remains to be done.
Source: Evangelii Praecones (Vatican.va)