By Anderson, Bernhard W.
By Eckersley, C. E.
By Eckersley, C. E., Macaulay, M.
By Allen, William Stannard
By Leech, Geoffrey N.
By Crystal, David, Davy, Derek
By Alexander, L. G.
By Greenbaum, Sidney, Quirk, Randolph
By Moody, H.L.B.
By Shakespeare, WILLIAM, Lott, Bernard
By Shaw, George Bernard
By Roget, Peter Mark, Lloyd, Susan M.
By Omer-Cooper, J.D., etc.
By Needham, D. E.
By Bajah, Sam 'Tunde, Godman, A.
By Beier, Ulli
By Tlali, Miriam
By Appiah, Peggy
By Charles Njoku
By Godman, A., Talbert, J.F.
By Mills, Therese
By Carew, Jan
By Nasir, S.J.
By Shahane, V.A.
By Simon, J.J.
By Alexander, L. G., etc.
By Nuffield Advanced Biology