Sumatra PDF Sumatra PDF is a long, thin continent that runs northwest-southeast. The Simeulue, Nias, Mentawai, and Enggano island groups are off Sumatra’s western coast, while
Sumatra PDF Sumatra PDF is a long, thin continent that runs northwest-southeast. The Simeulue, Nias, Mentawai, and Enggano island groups are off Sumatra’s western coast, while