Sulong Enjop
test drilling using reska 30/25 cdss rig exploration test well drilling and construction kg Nangka Matang Kuching division Sarawak RAK (E1 / E11) - GSKL 037/17/204 - Kuala Lumpur Jabatan Penyiasatan Kajibumi Malaysia 1991 - ill:44p. 29.8 cm
test drilling using reska 30/25 cdss rig exploration test well drilling and construction kg Nangka Matang Kuching division Sarawak RAK (E1 / E11) - GSKL 037/17/204 - Kuala Lumpur Jabatan Penyiasatan Kajibumi Malaysia 1991 - ill:44p. 29.8 cm