00451naa a2200157 a 450000100080000000500110000800800410001910000230006024501140008326000090019730000190020649000090022565000130023465300100024777300360025712666651995-03-08       1982    bl ---       0--  u    #d1 aSILVA, A. M. S. da  aErrors in the quantitative minesalogical analysis of soil sand fractions by the polarizing microscope method.  c1982  a227-230p. v.41  vv.41  aAnálise  aSolos  tAgronomia Lusitanagn.1/4, 1982