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12. Contribution à l'étude du Cambrien inférieur et du Precambrien III de l'Anti-Atlas marocain
13. Correlation of the Cambrian rocks in New York State
14. Cambrian rocks of the Pioche mining district, Nevada
15. Cambrian rocks of the Pioche mining district, Nevada
16. Cambrian and Precambrian rocks of the Groom district, Nevada, southern Great Basin
17. Cambrian and Precambrian rocks of the Groom district, Nevada, southern Great Basin
18. Cambrian trilobites of east-central Alaska,
19. Cambrian trilobites of east-central Alaska
20. Carbonate rocks of Cambrian and Ordovician age in the Lancaster quadrangle, Pennsylvania
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