Pipeline Accident Brief : Accident No. DCA-99-MP-004 National Transportation Safety Board (NTSB) 2000 Öppna dokument
Hazardous materials accident report : rupture of a railroad tank car containing hazardous waste near Clymers, Indiana, February 18, 1999 National Transportation Safety Board (NTSB) 2001 Öppna dokument
Railroad accident report : collision involving three consolidated rail corporation freight trains operating in fog on a double main track near Bryan, Ohio, January 17, 1999 National Transportation Safety Board (NTSB) 2001 Öppna dokument