00847nam0-22002651i-450-990001301250403321000130125FED01000130125(Aleph)000130125FED0100013012520000920d1975----km-y0itay50------baengIntroduction to spectral theoryselfadjoint ordinary differential operators.by LEVITAN B.M. and SARGSJAN I.S.Providence (RI)American Mathematical Society1975Translations of mathematical monographs39Levitan,B.M.48792Sargsjan,Ishkhan SaribekovichITUNINARICAUNIMARCBK990001301250403321C-29-(3919966MA1MA1Introduction to spectral theory188834UNINAING01