00429nam a2200145Ia 450000100060000000800410000604000130004708200160006010000220007624500760009826000530017430000110022754600070023865000380024527143140414s9999    xx            000 0 und d  cPK-LaUMT  a 581bART-P  aRicahrd N. Arteca  aPlant growth substancesbprinciples and applicationscRicahrd N. Arteca  aNew Delhi,India:bCommonwealth Publishers,c1997  a332 p.  aEN  aPlant growth promoting substances