Beets, C. (1984a) Preangerian (Late Miocene) Mollusca from a hill near Sekurau, northern Kutai, Kalimantan Timor (East Borneo). Scripta Geologica, 74, 1–37.
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Beets, C.
1984
Preangerian (Late Miocene) Mollusca from a hill near Sekurau, northern Kutai