003990000a22001330004500060000800000082001500008100001600023100002100039245009200060260005000152260000900202300000800211650004600219  a115  a631.46 GRA  aGraff, Otto  aSatchell, John E  aProgress in soil biology : Proceedings of the collogium on dynamics of soil communities  aAmsterdam, North - holland publishing company  c1967  a650  aSoil biology / soil biology - proceedings