00551nam a2200181 a 450000500170000008200160001710000230003324500490005626000350010530000280014049000370016863000200020563000230022596400250024899700180027399900170029195200610030820251203091009.0  a512.55bDOU  aDouglas, Ronald G.  aBanach algebra techniques in operator theory  aNew YorkbAcademic pressc1972  axvi, 212p.b22 cm.cHB.  aPure and applied mathematicsd49  aOperator theory  aAlgebra techniques  bEngc100de010fg_  a34639 LIBSC C  c26238d26238  00104070aPUbPUd1998-04-08l0o512.55 DOUp34639yBK