00471nam a2200121Ia 4500008004100000082001900041100003500060245009300095260005400188300002600242500005400268700002700322260909b        |||||||| |||| 00| 0 eng d  a510.6bAd244.7  aAdvances in Soviet Mathematics  aEstimates and asymptotics for discrete spectra of integral and differential equationsb/  aProvidence:bAmerican Mathematical Society,c1991  aV.7 - x, 204p. Index.  a"Purchased under NBHM grant for the year 1997-98"  aBirman, M. S.eeditor.