TY  - BOOK
AU  - Alex Unya Ambun
AU  - Gasah Lingkai
TI  - Report on quarry site investigation at Sungei Bua Batang Oya
PY  - 1980///
KW  - Quarries and quarrying
KW  - Batang Oya
KW  - Sarawak
N2  - Substantial reserve of good quality sandstone is believed to occur within the ridge
ER  -