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Nelson Lumbantoruan
title
ISBN-13
(ISBN-10)
year of publication
Sastra Lisan Batak Toba
978-602-9414-40-0
(602-9414-40-2)
2012
Sastra Lisan Batak Toba
978-602-9414-41-7
(602-9414-41-0)
2012
Nelson Lund