00317nam a2200097Ia 4500008004100000082002200041100002000063245006900083260003700152650003000189220204s9999    xx            000 0 und d  a338.432(520)bTSU  aTSUCHIYA, Keizo 0aProductivity and technological progress in Japanese agriculture.  aTokyobUniversity of Tokyoc1976  aAgricultural productivity