edited by Nils H. Axelsen. edited by Niels Bj瞨n-Andersen. edited by Carl J. Pauerstein. edited by Neil D. Jespersen. edited by Alvin M. Mauer. edited by N. J. D. Lucas. edited by Barry W. Sauer. edited by D.P. Laurie. edited by F. L. Bauer. edited by Heine H. Hansen.