Ong Wee Seck <br/><br/>
Ageological investigation on the limestone hills of G Keroh G Merawan G Karang Besar and G karang Kecil Simpang Pulai area Kinta district Perak (RAK F2) 

 - MX(N) 7 1977 
 - Ipoh Perak  Jabatan Penyiasatan Kajibumi Malaysia  1977 
 - ill:47p. 29. 8 cm