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Long-term reproducibility of 207Pb/206Pb age at the GSC SHRIMP lab based on the GSC Archean reference zircon z1242; Davis, W
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; Pestaj, T; Rayner, N
; McNicoll, V M. Geological
Survey of Canada, Scientific Presentation 111, 2019, 1 sheet,
https://doi.org/10.4095/321203 
Open Access