Thomson, Godfrey Hilton, Sir, 1881-1955 How to calculate correlations : a non-mathematical book of instru ctions / Godfrey Hilton Thomson. - New [2nd] ed. - London : Harrap, 1947. - 24 p. : ill. ; 22 cm. Subjects--Topical Terms: Statistics. Dewey Class. No.: P 310 T46