183 Then, too, the Catholics of the wealthier States are doing all they can to increase the effectiveness of the social and economic work that is being done for the poorer nations. We would give Our special approval to the increasing assistance they are giving, in all sorts of ways, to African and Asian students scattered throughout the universities of Europe and America; and to the care that is being devoted to the training of those persons who are prepared to go to the less wealthy areas in order to engage in work of technical and professional nature.
Source: Mater et Magistra (Vatican.va)