Ong Wee Seck <br/><br/>
A geological investigation on the limestone hills of G Panjang G Kandu G Mesah G Sepah and G Tunggal district of Kinta Perak 

 - MX (N) 13/1976 
 - Ipoh Perak  Jabatan Penyiasatan Kajibumi Malaysia  1976 
 - ill:45p. 29.8 cm