FOREIGN IMMIGRANTS: No one dares to believe that at present there are 20,000 foreigners working in Greece. When and how did they come here in what have been such dramatic and turbulent postwar times for the country? When and how did they settle? It is a mystery. Has the General Confederation of Greek Workers done anything about it? And it appears that there are almost, but not quite, 20,000 of them. The Labor Ministry should investigate the phenomenon and take action. Let us first become an El Dorado and then let, not 20,000, but 200,000 foreigners into the country. GREEKS IN KOREA: On Thursday (March 19), the 14th military unit left for Korea to relieve the soldiers and officers who have been fighting there for some time. They were seen off by the political and military authorities. BOUBOULIDIS: Following a proposal by the Literature Department and a decision by the plenum, the Athens Academy has awarded a prize to Mr Phaedon K. Bouboulidis for his unpublished scientific work on the life and work of the poet Lorenzos Mavilis. OPERA: The prime minister, Field Marshal Alexandros Papagos, after receiving a delegation of representatives from theater companies, categorically denied that there were plans afoot to disband the National Opera.