Labor contract -- History -- Congresses. : Bonded labour : global and comparative perspectives (18th-21st century) / Sabine Damir-Geilsdorf, Ulrike Lindner, Gesine Müller, Oliver Tappe, Michael Zeuske (eds.).
Labor costs -- Statistics. : Hourly compensation costs for production workers : 40 manufacturing industries ... countries, 1975 and ... / prepared by U.S. Department of Labor, Bureau of Labor Statistics, Office of Productivity and Technology.