00488nam a2200169Ia 4500082002100000100005100021245004700072260002500119300001500144500000500159690000600164700000500170952010200175964001700277921000900294999001500303  a338.901bN277.PS  aNational Bureau of Economic Research, New York  aProblems in the study of economic growthb  aNew YorkbNBERc1949  avii, 250p.  a  a   a  00104070aISIbISId1998-08-25l0o338.901 N277.PSpDP2683r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a6185  c6185d6185