Author: STEIN CALLENFELS, P.V. VAN & L. VAN VUUREN,
Title: Bijdrage tot de Topografie van de Residentie Soerabaia in de 14de eeuw.Offprint from:Tijdschrift van het Koninklijk Nederlandsch Aardrijkskundig Genootschap [TAG], 2e serie dl. XLI, 1924, afl. 1.
Description: Leiden, E.J. Brill, 1924. 8°. Original printed wrappers, stapled. pp.67-81 [=15pp.]. Footnotes/references, comparative tables in text, featuring Volcano Contours, dates of various eruptions (Gn. Kelut), monochrome extending maps of which one very large 1:100.000, with legenda illustrating a section of Surabaya residency with Brantas river basin(revised 1907); another smaller extending map illustrating Crater-rims and Lahar streems produced by Kelut Volcano with Brantas river basin; third map illustrating Kelut Volcano profiles observed from various compass directions: North-South, East-West. Detailed dutch language schrolarly investigations into the topography of Surabaya Residency, Java, Dutch East Indies, researching geology and volcanology of the region based on early sources, oral reports and recent interpretation of archaeological finds, geological structures, which includes sediments of Brantas River Basin, earthquakes and volcanic eruptions, focused on the history of Kelut volcano. Good copy.

Keywords: topography soerabaia surabaya district region geology earthscence volcanology volcanism watermanagement brantasriver java science research colonialism indonesia southeastasia