00265nam a2200109Ia 450000500170000000800410001708200120005810000170007024500260008726000340011330000080014720260224040813.0260224s9999||||xx |||||||||||||| ||und||  a543 GOR  aGordus, A.A. 0aAnalytical chemistry   aNew York: Macmillan Co.c1987  a242