Freund, John E. Mathematical statistics / John E. Freund, Ronald E. Walpole - 4th. ed. - Englewood Cliffs, N.J. : Prentice-Hall, 1987 - 608 p. ; 25 cm. Includes bibliographies and indexes ISBN: 1356207509 LCCN: 86-21249 Subjects--Topical Terms: Mathematical statistics