00326nam a2200121Ia 4500008004100000082001300041100002000054245005900074250001200133260002600145300001200171650002100183140224s9999    xx            000 0 und d  a581.1 J0  aStiles, Walter.  aAn introduction to the principles of plant physiology.  a2nd Ed.  aLondonbMethuenc1950  ax,701p.  aPlant physiology