00313nam a2200109Ia 4500008004100000082001600041245004600057260004100103300001200144600001900156650002800175130903s9999    xx            000 0 und d  a631.547  J7  aThe experimental control of plant growth.  aNew YorkbRonald Press Companyc1957  ax,350p.  aWent, Frits W.  aPhysiology,Plant growth