Bruning, Eberhard F. β€œOn the Seasonality of Droughts in the Lowlands of Sarawak (Borneo)”. ERDKUNDE 23, no. 2 (June 30, 1969): 127–133. Accessed October 8, 2024. https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/1580.