O) 1964 LIBERIA, PRESIDENT JOHN FITZGERALD KENNEDY, XF
O) 1981 LIBERIA, IMPERFORATE PROGRESSIVE PROOFS - WORLD CUP SOCCER CHAMPIONSHIPS 1930 AND 1934 - 1954 AND 1958
O) 2020 LIBERIA, MEDICINE, PANDEMIC, COVID 19, SARS COV 2, BIOSECURITY MEASURES, PROFESSIONALS IN EPIDEMIOLOGICAL RESEARCH, SET MNH