Fisher, Ronald Aylmer, Sir, 1890-19622006-11-162006-11-161921Metron, 1: 3-32 (1921)http://hdl.handle.net/2440/15169Reproduced with permission of Metron1401023 bytesapplication/pdfen014: On the "Probable Error" of a Coefficient of Correlation Deduced from a Small Sample.Journal article