Dynamic waves in civil engineering : proceedings of a conference organized by the Society for Earthquake and Civil Engineering Dynamics, held at University College of Swansea on 7-9 July 1970 / edited by D.A. Howells, I.P. Haigh, C. Taylor. - Howells, D. A.; Haigh, I. P.; Taylor, C. (Cedric), 1936- (Wiley-Interscience, 1971)