FORGOTTEN KINGDOMS IN SUMATRA
F. M. Schnitger, Ph. D,
FORGOTTEN KINGDOMS IN SUMATRA
Leiden E. J. Brill, 1939
SUMATRA - ITS HISTORY AND PEOPLE & THE ARCHEOLOGY AND ART OF SUMATRA
Edwin M. Loeb,
SUMATRA - ITS HISTORY AND PEOPLE
Robert Heine-Geldern,
THE ARCHEOLOGY AND ART OF SUMATRA,
Vienna: The Institut Für Völkerkunde (W. Koppers), 1935