00365nam a2200121 a 450000500170000002000150001708200190003210000060005111000400005724500800009726000400017730000260021720251203110045.0  a0824794400  a581.13342bZAM  d_  aZamski, Eli and Schaffer, Arthur A.  aPhotoassimilate distribution in plants and cropsbsource-sink relationships  aNew YorkbMarcel Dekker, Inc,c1996  axii,905p.c24 cm H.B.