National product since 1869 / Simon Kuznets assisted by Lillian Epstein and Elizabeth Jenks. Kuznets, Simon Smith, 1901- Epstein, Lillian. Jenks, Elizabeth. National Bureau of Economic Research. National income United States. 339 KUN [A study by the] National Bureau of Economic Research. New York : National Bureau of Economic Research Inc., 1946. 1946. 1946 Text xvi, 239p. : eng Publications of the National Bureau of Economic Research ; no. 46 United States.