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Clay Mineralogy and Isotope Geochemistry of the Alteration Halo At the Cigar Lake Uranium Deposit; Percival, J B; Bell, K;
Torrance, J K. Canadian Journal of Earth Sciences vol. 30, no. 4, 1993 p. 689-704,
https://doi.org/10.1139/e93-056 (GSC Cont.# 48590)