http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
proceedings of the International Conference on the Economics of the Shadow Economy held at the University of Bielefeld, West Germany, October 10-14, 1983
International Conference on the Economics of the Shadow Economy (1983 : Bielefeld, West Germany)
edited by Wulf Gaertner and Alois Wenig.
Studies in contemporary economics ; v. 15