Edited by R. H. Gallagher and O. C. Zienkiewicz. edited by S.N. Atluri, R.H. Gallagher, and O.C Zienkiewicz. edited by A. R. Butler and M. J. Perkins. edited by G.N. Pande, O.C. Zienkiewicz. edited by A.R. Butler and M.J. Perkinks. edited by F. A. Skinner and D. W. Lovelock. edited by J. A. V. Butler and J. T. Randall. edited by K.J. Miller and E.R. de los Rios. edited by M.H. Walter and R.F. Cox. edited by A. Parker and B.W. Sellwood.