00438naa a2200121 a 450000100080000000500110000800800410001910000150006024500630007526000090013865000180014777301510016518300612013-08-14       1990    bl ---       0--  u    #d1 aPOWELL, W.  aEnvironmental and genetic aspects of pollen embryogenesis.  c1990  aEmbriogénese  tIn: BAJAJ, Y. P. S. Haploids in crop improvement I. Berlin: Springer-Verlag, 1990, p. 45-65 (Biotechnology in Agriculture and Forestry, 12), 1990.