004350000a22001450004500100002300000100002900023245004400052260003500096260001300131250001500144300002000159041001100179082001400190650008500204  a  aCoxbJoseph F.  a  aJacksonbLyman Edson  a  Crop management and soil conservation  ab  aNew YorkbJohn wileycUS  c  a1948  a  2nd. ed.  a  axxii, 572p.  a  <En>  a  633/COX  a  <Agriculture><Crops><Soils><Farm management><Soil conservation><United States>