edited by I. R. Hill and S. J. L. Wright. edited by J. A. Bondy, U. S. R. Murty edited by E. L. Grove, A. J. Perkins. edited by I. M. Allison and C. Ruiz. edited by J. A. Bondy, U. S. R. Murty. edited by D. L. Colton and R. P. Gilbert. edited by J. W. S. Hearle and L. W. C. Miles. edited by D. W. Slocum and O. R. Hughes. edited by C. R. Hill, V. R. McCready, D. O. Cosgrove. edited by C. J. Allegre and S. R. Hart.