Lihat Juga

• The cost of social security basic tables : Fourteenth international inquiry, 1987-1989
  Terbitan: (1995)
• The cost of social security : twelfth internasional inquiry, 1981-1983 comparative tables ..
  Terbitan: (1988)
• The cost of social security : eleventh international inquery, 1978-1980 ..
  Terbitan: (1985)
• Comprehensive system of international peace and security : a documentation
  Terbitan: (1987)
• The cost of social security
  Terbitan: (1992)