Title: Note on Mollusca from the Lower Mentawir Beds, Balikpapan Bay area, Kalimantan (East Borneo) ; Late Miocene Mollusca from Tapian Langsat and Gunung Batuta, Sungai Bungalun area, Kalimantan (E. Borneo)
Subjects: Fossil Mollusks, Paleontology
Places: Indonesia, Kalimantan Timur
Time periods: Miocene, Neogene