Steel, Robert George Douglas, 1917- Principles and procedures of statistics : a biometrical approach / Robert G.D. Steel, James H. Torrie. - 2nd ed. - New York : McGraw-Hill, c1980. - xxi, 633 p. : ill. ; 24 cm. Includes index. ISBN: 0070609268 Subjects--Topical Terms: Mathematical statistics.Biomathematics. Dewey Class. No.: 519.5