When did the author who wrote The Grapes of Wrath die?
20-Dec-68
1939
1939
1939
1939
1939
1939
1931
1939
1931
1939
1931
1956
1939
1931
1956
1939
1932
1956
1931
1939
1956
1932
1931
1956
1939
1932
1945
1931
1956
1962
December 11, 1939
1939
1945
1932
1956
1931
1962
December 6, 1939
1945
August 14, 1939
1959
1939
1956
1962
1932
1940
1931
1947
1945
1959
1956
1962
1940
1939
1947
1932
1945
August 2, 1956
December 6, 1939
1931
1959
1956
1948
August 14, 1939
1962
1946
1940
1971
December 2, 1956
1951
1927
1947
1939.
1939
1945
1932
August 2, 1959
1959
1956
January 11, 1956
1948
December 11, 1956
1931
1962
1946
1940
1971
1963
1951
December 15, 1956
1947
1972
August 11, 1959
1945
August 15, 1956
1927
1949
1959
1939
1956
December 11, 1959
1948
1939.
1960
1962
1946
1932
1940
1971
1963
1951
1950
1931
1947
1961
1953
1972
1945
1973
1964
1949
1944
1959
1956
1948
1960
1927
1962
1946
1940
1971
1939
1963
1915
1909
February 14, 1939
1951
1950
1947
1932
1961
1939.
1953
1972
1945
1931
1973
1964
1949
August 2, 1959
1944
1959
1956
1948
1960
1957
December 15, 1940
1962
1946
1940
August 2, 1956
1971
1963
December 15, 1962
1951
1950
1927
1947
1961
1953
1941
1972
1939
1945
1965
1973
1964
1949
August 2, 1962
December 11, 1972
December 2, 1956
1932
1944
1905
1939.
1931
1940
1912
1915
1923
December 15, 1940
August 14, 1959
December 6, 1946
August 2, 1959
1939
December 15, 1946
1909
August 10, 1959
1932
1922