00472nam a22001697a 4500 20260407115001.0 260407b |||||||| |||| 00| 0 eng d 521073693 eng 519.532 ELD/S Elderton, William Palin Systems of Frequency Curves / by William Palin Elderton London: Cambridge University Press, 1969. vii, 216p.; Johnson, Norman Lloyd BK 45241 45241