William R. Tolbert Jr. only served as President of Liberia from 1970 until 1980.
William Richard Tolbert Jr. -LRB- May 13 , 1913 -- April 12 , 1980 -RRB- was the 20th President of Liberia from 1971 until 1980 , when he was killed in a coup d'Ã©tat led by Samuel Doe .
William R. Tolbert Jr.
only served as President of Liberia
from 1970 until 1980
from 1971 until 1980