Metal (Cu, Fe, Mn, Zn) pollution assessment of surface sediments in Miri River estuarine mangrove, Sarawak, Malaysia - Billah, Md. Masum; Mustafa Kamal, Abu Hena; Idris, Mohd Hanafi; Ismail, Johan; Abdullah, Nur Anisah (Department of Biology, Faculty of Science, Universiti Putra Malaysia, 2014)