Principles and procedures of statistics : with special reference to the biological sciences / Robert G. D. Steel [and] James H. Torrie. Steel, Robert George Douglas, 1917- Torrie, James Hiram, 1908- joint author. Mathematical statistics. Biomathematics. QA276 .S82 519.9 STP Includes bibliographical references and index. New York : McGraw-Hill, 1960. 1960. 1960 Text xvi, 481 p. : eng