00298nam a2200109Ia 450000500170000000800410001708200160005810000150007424500500008926000410013930000080018020260224040900.0260224s9999||||xx |||||||||||||| ||und||  a628.501 DEA  aDean, J.R. 0aExtraction methods for environmental analysis  aChichester : John Wiley & Sonsc1998  a225