00374    a2200121   450000500170000002000160001708200190003310000200005224500440007225000120011626000500012830000740017820250505114720.0  a7121-0427-5  aLECT 001.6 AND  aANDERSON, R. G.  aData Processing and Management  systems  a2nd Ed.  aPlymouthbMacdonald and Evans Limited c1978   axiii, 402p.: ill.; charts, figures, pictures, tables, bindex,c18cm,