H. N. A. Priem, N. A. I. M. Boelrijk, E. H. Bon, E. H. Hebeda, E. H. Hebeda, E. A. T. Verdurmen, and R. H. Verschure. “Isotope Geochronology in the Indonesian Tin Belt”. Netherlands Journal of Geosciences (January 1, 1975): 61-70. Accessed May 8, 2026. https://njgjournal.nl/index.php/njg/article/view/14385.