00330nam a2200109Ia 4500008004100000082002300041100001500064245006200079260002800141650002800169650002300197220204s9999    xx            000 0 und d  a631.46:579.64bLYN  aLYNCH, J M 0aSoil biotechnology: Microbial factors in crop production.  aLondonbBlackwellc1983  aPlant growth regulators  aSoil biotechnology