- National Security: The Economic and Environmental Dimensions (Worldwatch paper)
- Swords into Plowshares: Converting to a Peace Economy (Worldwatch Paper ; 96)
- Worldwatch Paper 84 : Rethinking the Role of the Automobile
- Grund-Regel Oder Weeg-Weiser Zu Der Lateinischen Sprache
- Vital Signs 2000-2001: The Environmental Trends That Are Shaping Our Future