Distribution of rare earth elements in sediment cores of Sedili and Tanjung Pelepas, Johor as pollution indicator - Koh, Wai Seong; Sabuti, Asnor Azrin; Yusoff, Abdul Hafidz; Zulkifli, Syaizwan Zahmir; Ismail, Ahmad; Mohamed, Che Abd Rahim (Department of Biology, Faculty of Science, Universiti Putra Malaysia, 2014)