00685nam a2200193Ia 4500082002100000100002200021245004800043260003500091300002900126490007000155500000500225690000600230700000500236952010300241952010300344964001700447921001000464999001700474  a515.35bSc314.SP  aSchechter, Martin  aSpectra of partial differential operatorsb  aAmsterdambNorth-Hollandc1971  axiii, 267p. Index, Bibl.  aNorth-Holland series in Applied Mathematics and mechanicsv v. 14  a  a   a  00104070aISIbISId1998-09-28l0o515.35 Sc314.SPpDP17466r2019-02-14 00:00:00w2019-02-14yBK  00104070aISIbISId1998-09-28l0o515.35 Sc314.SPpDP17685r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a14476  c14476d14476