1. Bhopal;Lepkowski;Chem. Engng News,1985
2. Indian city tries to regain footing a year after a leak of deadly gas;Weisman;New York Times,1985
3. Technology out of control;Engler;Nation,1985
4. Man-Made Disasters;Turner,1978
5. NASA had warning of potential shuttle accident;Smith;Science,1986