00286nam a2200109Ia 4500082002000000100002000020245006600040260000900106300001600115490004000131500000500171  a338.10952 J72b  aJohnston, B. F.  aAgricultural productivity and economic development in Japanb  c1951  app. 498-513  aJournal of farm Economic, Dec. 1951  a