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  • Biowarfare Lessons, Emerging Biosecurity Issues, and Ways to Monitor Dual-Use Biotechnology Trends in the Future
    USAF Institute for National Security Studies
    Purkitt, Helen E., 1950-
    2005-09
  • War Next Time: Countering Rogue States and Terrorists Armed with Chemical and Biological Weapons -- Chapter 3: Secret Program: South Africa's Chemical and Biological Weapons
    USAF Counterproliferation Center
    Burgess, Stephen Franklin; Purkitt, Helen E., 1950-
    2004-04
  • What's Over the Biotechnological Horizon? R&D Trends in South Africa Civilian Biotechnology & Implications for Monitoring Future Dual Use Biotechnology Trends in the Developing World
    United States. Defense Threat Reduction Agency. Advanced Systems and Concepts Office
    Purkitt, Helen E., 1950-
    2002?
  • Rollback of South Africa's Chemical and Biological Warfare Program
    USAF Counterproliferation Center
    Burgess, Stephen Franklin; Purkitt, Helen E., 1950-
    2001-04
  • Rollback of South Africa's Biological Warfare Program
    USAF Institute for National Security Studies
    Burgess, Stephen Franklin; Purkitt, Helen E., 1950-
    2001-02
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