00265nam a2200097Ia 4500008004100000082001200041100004300053245003000096260003300126300000800159140113s9999    xx            000 0 und d  a581.143  a"Bickford, Elwood.D. and Dum, Stuard."  aLighting for plant growth  bThe Kent Univ. PresscU.S.A.  a221