Pipeline accident summary report : Pipeline rupture, liquid butane release, and fire lively, Texas, August 24, 1996 National Transportation Safety Board (NTSB) 1998 Öppna dokument
Pipeline accident report : San Juan Gas Company, inc./Enron corp, propane gas explosion in San Juan, Puerto Rico, on November 21, 1996 National Transportation Safety Board (NTSB) 1997 Öppna dokument