Ah Sai, Gan Geology And Mineral Resources Of The Tanjung Malim Area Perak Darul Ridzuan Geological Survey Malaysia Gan Ah Sai - 1st Edition - Ipoh Jabatan Percetakan Negara 1992 - xvii, 65p. ill. fig., tables, plates map 25cm includes index includes references ISBN: RM30.00 Subjects--Topical Terms: Geology--Rocks and Mineral Resources--Perak