By Gagne, Robert M., Briggs, Leslie J., Wager, Walter W., Wagner, Walter W.
By Holland, Walter W., Stewart, Susie
By Holland, Walter W., Stewart, Susie, Nuffield Trust
By Chaucer, Geoffrey, Skeat, Walter W.
By Linstromberg, Walter W.
By Holland, Walter W., etc., Detels, Roger, Knox, George
By Barker, Kenneth L., Burdick, Donald W., Stek, John H., Wessel, Walter W., Youngblood, Ronald F., Boa, Kenneth D.
By Skeat, Walter W.