Ong, Chit Chung. <br/><br/>
The landward defence of Singapore (1919-1938) / 
Ong Chit Chung. 
 - National University of Singapore, Singapore  :  Centre for Advanced Studies,  1988. 
 - 50 p. ;  24 cm. 
 - Occasional paper .
<br/><br/>p. 47-50. 
<br/><br/><label>ISBN: </label>9971641720 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fortification--Singapore.