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Health Safety and Environment Department Petronas Corporation, . (1999) Environmental conservation and management at Petronas. In: 20 tahun kecemerlangan pengurusan alam sekitar di Malaysia (1975-1995). Jabatan Alam Sekitar Kementerian Sains Teknologi dan Alam Sekitar, Kuala Lumpur Malaysia, pp. 209-213. ISBN 983-9119-74-5