00689cam a22002291 4500 e 28000084 DLC 20260227111218.0 810622s1927 xx a 000 0 eng e 28000084 (OCoLC)14737420 DLC DNLM DLC HA31 .E4 1927 HA 29 E37f 1927 Elderton, William Palin, Sir, 1877-1962. Frequency curves and correlation, by W. Palin Elderton ... 2d ed. London, C. & E. Layton, 1927. vii, [1], 239 p., 1 l. ill. "First edition, 1906. Second edition, 1927." "References": p. 232-234. 20907 20907