Aitken, Alexander Craig 1895 Statistical Mathematics - 5a. ed. - Edinburg : Oliver and Boyd ; Interscience publ., 1947. - vii, 153 p. : gráfs. ; 19 cm. - University mathematical texts . Apéndice, pp. 145-148 Subjects--Topical Terms: ESTADISTICA MATEMATICA Universal Decimal Class. No.: 519.2