00883nam0-22003011i-450 99000083293040332120190402134933.0000083293FED01000083293(Aleph)000083293FED0100008329320001010d1972----km-y0itay50------baengy-------001yyOperational methods in mathematical physicsH. Jeffreys2.ed.New YorkHafner Publishing Company1972VI, 119 p.22 cmCambridge tracts in mathematics and mathematical physics23Jeffreys,Harold12419ITUNINARICAUNIMARCBK99000083293040332102 65 D 7654FINBNFINBNOperational methods in mathematical physics1548268UNINAING01