Linge, Luth Ari. <br/><br/>
Malapetaka di bumi Sumatra / 
Luth Ari Linge. 
 - Medan :  Kemalasari Enterprise,  1993. 
 - 124 p. ;  21 cm. 
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Sumatra (Indonesia)--History.