edited by Robert L. Metcalf and William H. Luckmann. edited by Roderick K. Clayton and William R. Sistrom. edited by Louis Landweber and Philip G. Hubbard. Wolfgang S. Homburger, editor ; Louis E. Keefer and William R. McGrath, associate editors. edited by Douglas T. Stuart and William T. Tow. edited by Achim M鑥ller and William E. Newton. edited by David I. Cleland, William R. King. edited by William E. Newton and William H. Orme-Johnson.