Waldram, Percy J. The principles of structural mechanics : treated without the use of higher mathematics / Percy J. Waldram. - 3rd rev ed. - London : B.T. Batsford ltd., c 1948.. - 383 p. : ill. ; 20 cm. Includes index. 326 326 Subjects--Topical Terms: Engineering mechanics.Legal systems. Dewey Class. No.: 620.1 / W147p