00372nam a2200157Ia 4500008004100000020000900041035000900050082001600059100002100075245004800096250000800144260004200152300000800194500000600202650000600208210723s9999||||xx |||||||||||||| ||und||  aNULL  a9340  a530.15BJEF  aJeffreys, Harold 0aOperational Methods In Mathematical Physics  a2nd  aCambridgebCambridge University Press  a117  a0  a-