Westerveld, J. (1947). On the origin of the acid volcanic rocks around Lake Toba, North Sumatra: A further contribution to the knowledge of welded rhyolite-tuffs deposited along the Sumatran longitudinal fault-trough system, and a critical examination of data concerning the formation of the great Toba cauldron. Noord-Hollandsche Uitg. Maatschappij.
Chicago-Zitierstil (17. Ausg.)Westerveld, Jan. On the Origin of the Acid Volcanic Rocks Around Lake Toba, North Sumatra: A Further Contribution to the Knowledge of Welded Rhyolite-tuffs Deposited Along the Sumatran Longitudinal Fault-trough System, and a Critical Examination of Data Concerning the Formation of the Great Toba Cauldron. Amsterdam: Noord-Hollandsche Uitg. Maatschappij, 1947.
MLA-Zitierstil (9. Ausg.)Westerveld, Jan. On the Origin of the Acid Volcanic Rocks Around Lake Toba, North Sumatra: A Further Contribution to the Knowledge of Welded Rhyolite-tuffs Deposited Along the Sumatran Longitudinal Fault-trough System, and a Critical Examination of Data Concerning the Formation of the Great Toba Cauldron. Noord-Hollandsche Uitg. Maatschappij, 1947.