By International Labour Office
By Oakley, Peter, etc.
By Edited by Jeanne Mager Stellman
By Starr, Gerald
By Beckerman, Wilfred
By Shahandeh, Behrouz
By Meredith, Geoffrey G., Nelson, Robert E., Neck, Philip A.
By Jose, A.V.
By Unnamed, Unnamed
By Kubr, Milan, Prokopenko, Joseph
By Standing, Guy
By ILO
By Dixon-Mueller, Ruth
By Bhalla, A. S.
By Roberts, C.R.Wynne-, Kanawaty, George
By Kubr, Milan