Míreanna comhchosúla: Vital Signs, Volume 20 :
- Vital Signs 1994 : The Trends That Are Shaping Our Future /
- Vital Signs 1996 : The Trends That Are Shaping Our Future /
- Vital Signs 2003 : The Trends that Are Shaping Our Future /
- Vital Signs 2005 : The Trends That Are Shaping Our Future /
- Vital Signs 2001 : The Trends that Are Shaping Our Future /
- Vital Signs 1993 : The Trends that Are Shaping Our Future /