00390nam a2200121Ia 4500082002000000100003100020245008500051260003300136300002800169500000500197700003100202700003500233  a519.91bG475.PO  aGill, Philip E. and Others  aPractial optimizationbcBy Philip E. Gill, Walter Murray and Margaret H. Wright  aLondonbAcademic Pressc1981  axvi, 401p. Index, Bibl.  a  aMurray, Walter ; jt. auth.  aWright, Margaret H.; jt. auth.