Burwell, A., Friend, C., & Hughes, D. (1978). Late Archaean metamorphic Rb-Sr isochron ages from basic and ultrabasic rocks in the Bjørnesund – Ravns Storø region, southern West Greenland. Rapport Grønlands Geologiske Undersøgelse, 90, 135–141. https://doi.org/10.34194/rapggu.v90.7612