1. IOR/X/14510/1 Reference (shelfmark): IOR/X/14510/1 Title: Sumatra Northern Sheet ISTD Edition 1944. Northern Sumatra Geology after Zwierzycki (1919) simplified with amendments in Bireuen & Toba Lake areas & south of Langsaa. Compiled & drawn ISTD. February 1944. I.S.T.D./F/367 Collection Area: Map Collections Languages: English Date Range: Unspecified Extent: 1 item