Heavy metal accumulation in the organs of the little heron (Butorides striatus) and spotted redshank (Tringa erythropus) collected dead in Kuala Gula Bird Sanctuary Perak, West Coast of Peninsular Malaysi - R. M., Lomoljo; Ahmad, Ismail; Yap, Chee Kong; A., Rahim Ismail (Faculty of Science, Universiti Putra Malaysia, 2009)