00515nam a2200193 a 450000100080000000500110000800800410001910000180006024500640007826000390014230000100018149000210019165000330021265000220024565000100026765000120027765000130028970000190030219321582023-01-31       1918    bl uuuu     u0uu1 u    #d1 aHOFFER, G. N.  aSelection of disease-free seed corn.h[electronic resource]  aLafayette: Purdue Universityc1918  a15 p.  a(Bulletin, 224).  aPlant diseases and disorders  aDoença de planta  aMilho  aSemente  aZea Mays1 aHOLBERT, J. R.