Sulong Enjop <br/><br/>
Hydrogeological investigation in the Ilas area Igan Sibu division Sarawak : RAK (E11) 

 - GSKL 037/20/249 
 - Kuala Lumpur  Jabatan Penyiasatan Kajibumi Malaysia  1995 
 - ill:102p. 29.8 cm  Hydrogeological investigations in the Ilas area Igan Sibu division Sarawak