Mahisham b Ibrahim <br/><br/>
Longgokan/kewuhuddan timah lod di Malaysia 

 -  MX (M) 10/1985 
 - Ipoh Perak  Jabatan Penyiasatan Kajibumi Malaysia  1985 
 - ill:20p. 29.8 cm  Labiran 1:Taburan longgokan kewujudan timah lod