Steel, Robert George Douglas. Principles and procedures of statistics / [by] Robert G. D. Steel [and] James H. Torrie. - New York : McGraw-Hill Book Company Incorporation, c1960. - 481 pages : Illustrations ; 24 cm. Includes bibliography. Subjects--Topical Terms: Biomathematics.Mathematical statistics. LC Class. No.: QA276 / .S82 Dewey Class. No.: 519.9