00428nam a22001337i 4500001001000000005001700010008004100027082002200068100002600090245009600116260002600212300001700238650003900255SXC02078620260819093704.0260101s1991    ii            000 0 eng d  a543.089 SEW-C222  aSewell, Peter, et al.10aChromatographic separations: Analytical chemistry by open learning /cSewell, Peter, et al.  abACOL, London,c1991  ap. ;c22 cm. 0aChromatography; Analytic chemistry