00609cam 2200217 450 1718072http://id.bnportugal.gov.pt/bib/porbase/171807220030626073300.00-12-221350-529252PTBN0094355119720911d1972 k y0pory0103 baengUSBanach algebra techniques in operator theoryNew YorkAcademic Press1972XVI, 216 pPure and applied mathematics49517.98medeng331396DouglasRonald G.191547PTBNRPC47B/DOUcoopUCMAefalt221516bccoopUCMA87560CMA18-782