00361nam a2200121 a 450000500170000002000150001708200160003210000060004811000510005424500870010526000280019230000190022020251203110336.0  a0849304393  a660.65bLET  d_  aLetourneau,Deborah K. and Burrows, Beth Elpern  aGenetically Engineered organismsbassessing environmental and human health effects  aLondonbCRC Pressc2002  a438p.c22cm.HB