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Whitehouse, Martin J.; Nägler, Thomas; Moorbath, Stephen; Kramers, Jan D.; Kamber, Balz S.; Frei, Robert (2001). Priscoan (4.00–4.03 Ga) orthogneisses from northwestern Canada - by Samuel A. Bowring and Ian S. Williams: discussion. Contributions to mineralogy and petrology, 141(2), pp. 248-250. Springer 10.1007/s004100100240
