http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
work conditions in football manufacturing in China, India and Pakistan
Peter Lund-Thomsen, Khalid Nadvi, Anita Chan, Navjote Khara, Hong Xue
volumen43, número6, (2012), páginas 1211-1237 : tablas, gráfico