By Farquhar, John David, Heidensohn, Klaus
By M.F. Fuller, D. A. Lury
By Laidler, David E. W.
By Grant, Ronald M., Shaw, Graham Keith
By Reekie, W. Duncan
By Colman, David, Nixson, F.I.
By Chrystal, K.Alec
By Shell, Donald
By Harvey, A.C.
By Arnold, John, etc.
By Parkin, Michael, Bade, Robin
By Fuller, M.F., Lury, D. A.