00500nam a2200169Ia 4500082002200000100001900022245008900041260002500130300001500155500000500170690000600175700000500181952010300186964001700289921000900306999001500315  a338.6042bB251.TI  aBarger, Harold  aTransportation industries 1889-1946; a study of output employment and productivityb  aNew YorkbNBERc1951  axvi, 288p.  a  a   a  00104070aISIbISId1998-08-21l0o338.6042 B251.TIpDP7100r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a5505  c5505d5505