Burr, William H. 1851-1934. The graphic method by influence lines for bridge and roof computations / by William H. Burr and Myron S. Falk. - 2d ed. 2nd thousand. - New York, J. Wiley & sons; [etc., etc.] 1909. - xi, 253 p. diagrs. (4 fold.) 24 cm. Subjects--Topical Terms: ESTATICA GRAFICAESTRUCTURASTENSIONES Universal Decimal Class. No.: 624.04