Columbia subject headings:
Hazardous substances--Accidents--Texas--Pasadena.
Liquefied petroleum gas--Accidents--Texas--Pasadena.
Railroad accidents--Texas--Pasadena.
Tank cars--Accidents--Texas--Pasadena.
Harvard subject headings:
Hazardous substances--Accidents--Texas--Pasadena.
Liquefied petroleum gas--Accidents--Texas--Pasadena.
Railroad accidents--Texas--Pasadena.
Tank cars--Accidents--Texas--Pasadena.
Princeton subject headings: