A geomorphological reconnaissance of Sumatra and adjacent islands (Indonesia). [By] H. Th. Verstappen. International Institute for Aerial Survey and Earth Sciences (I.T.C.), Enschede.
By: Verstappen, H. Theodoor (Herman Theodoor) Verstappen, H. Theodoor (Herman Theodoor).
Contributor(s): International Institute for Aerial Survey and Earth Sciences.
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