edited by G. Johannsen and J.E. Rijnsdorp. edited by G. Cochard and P. Kessler. edited by G. Ganetsos, P.E. Barker. edited by G. Bracchi, G. M. Nijssen. edited by G. D. Birnie and D. Rickwood. edited by G. Sumner and V.B. Livesey. edited by G. Turian and H.R. Hohl. edited by G. N. Pande & O. C. Zienkiewicz. edited by Douglas E. Johnson. edited by G. Ferrate and E.A. Puente.