00391nam a2200145 a 4500041000800000082001800008100002000026245007000046260003800116300001000154440003300164650002200197650001600219651001000235  aeng  a338.1bO45d43  aOhkawa, Kazushi  aDiferential structure and agriculturebessays on dualistic growth  aTokyobKinokuniya Bookstorec1972  a298 p  aEconomic Research Seriesn13  aECONOMIA AGRICOLA  aAGRICULTURA  aJAPON