John Alang Usang <br/><br/>
Limestone reserves in the Batu Gading area on the Baram River 
John Alang Usang 
 -  [19?] 
 - Iv(unnumbered)  ill.  30cm 
<br/><br/> Over 19,000,00 long tons of good quality limestone has been measured near the Baram River at Batu Gading, Bukit northeast from Bukit Betok have not been mapped, but there are indications of many more million tons. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mineral--Sarawak--Batu Gading<br/>Geology--Sarawak--Batu Gading
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Batu Gading(Sarawak)