WILBUR LEIGH, CHARLES Y OTRO PRACTICAL MECHANICS AND STRENGTH OF MATERIALS - 3 - NEW YORK-U.S.A. MCGRAW-HILL 1940 - 498 pag 19 cm - 0 0 . STRESSES-MATERIALS/FORECES-FRICTION Subjects--Topical Terms: CIENCIAS PURAS Dewey Class. No.: 531 / W57