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082 _a512.5
_bLAT
100 _aTosio Kato
245 _aShort introduction to perturbatton theory for linear operations
260 _aLondon
_bSpringer Verlag
_c1982
300 _axiii,161 p.
_b24 cm
630 _aMathemetics:LinearOperations
964 _b
_c
_d
_e
_f
_g_
997 _a6937 LIBSC C
999 _c6863
_d6863