Freund, John E. Mechanics of materials James M. Gere, Barry J. Goodno. - 7th.ed. - Upper Saddle River, N.J. Prentice Hall c1999. - xi, 532 p. ill. (some col.) 24 cm. Includes bibliographical references (p. 477-479) and index ISBN: 0130210331 Subjects--Topical Terms: Statistics.