00309nam a2200109Ia 450000500170000000800410001702000180005808200140007610000200009024500480011026000410015820250107154654.0241216s9999||||xx |||||||||||||| ||und||  a0-409-90199-7  a660.6 GIN  aLev R. Ginzburg 0aAssessing ecological risks of biotechnology  aMadisonbButterworth-Heinemannc1991