00347nam a2200121Ia 4500008004100000082002000041100001600061245007000077260002800147300001200175600001500187650002300202140224s9999    xx            000 0 und d  a631.461(042) M3  aLynch, J.M.  aSoil biotechnology: microbiological factors in crop productivity.  aOxfordbBlackwellc1983  ax,191p.  aJ.M. Lynch  aSoil biotechnology