W.B. Agocs & J.R. Paton <br/><br/>
Extract from Colombo Plan Report on airborne magnetometer and scintillation counter survey over parts of Perak, Selangor & Negeri Sembilan ( Area 1 ) 

 - 
 - Perak:   Geological Survey Ipoh, Ministry of Natural Resources, Federated of Malaya,    1959 
 - ill. 49 p.-  25.3cm  Accompanying material: Composite map.