Botones, L. (1999). QC execs cleared in Ozone tragedy. Manila Times.
Dyfyniad Arddull ChicagoBotones, Lea. "QC Execs Cleared in Ozone Tragedy." Manila Times 1999.
Dyfyniad MLABotones, Lea. "QC Execs Cleared in Ozone Tragedy." Manila Times, 1999.
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