Engineering geology of Ipoh-Changkat Jering Expressway Perak Darul Ridzuan - Ong, Chu Yin (Faculty of Physical and Applied Sciences, UKM, Bangi : Geology Department, 1989)
Thesis (M.Sc.) - Universiti Kebangsaan Malaysia, 1989
Keywords: Engineering geology -- Perak -- Ipoh; Express highways -- Perak -- Ipoh