00332nam a2200121Ia 4500008004100000082002000041100001800061245004000079260003100119300001300150600001700163650003000180140224s9999    xx            000 0 und d  a593.13:581.2 L3  aWallace, H.R.  aNematode ecology and plant disease.  aLondonbEdwar Arnoldc1973  aix,228p.  aH.R. Wallace  aNematology,Plant diseases