Tan, Denis Ngah Kiat <br/><br/>
Lupar valley, West Sarawak Malaysia : explanation of sheets 1-111-14, 1-111-15 and part of 1-111-16 / 
by Dennis Tan Ngah Kiat 
 - Kuching :  National Printing Department,  1979 
 - 159 p. :  ill. 
 - Report ;  13 .
<br/><br/> Two coloured geological maps are in the pocket inside the back cover 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Sarawak