00536nam a2200169Ia 4500082002100000100005400021245003400075260004800109300001600157500000500173690000600178700003500184952010300219964001700322921001000339999001700349  a519.532bEl37.SF  aElderton, William Palin and Johnson, Norman Lloyd  aSystems of frequency curvesb  aCambridgebCambridge University Pressc1969  a216p. Index  a  a   aJohnson, Norman Lloyd ;jt.auth  00104070aISIbISId1998-10-07l0o519.532 El37.SFpDP14085r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a15597  c15597d15597