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Start Over You searched for: Author/Creator Sims, G. L. Remove constraint Author/Creator: Sims, G. L. Collection Miscellaneous investigations series Remove constraint Collection: Miscellaneous investigations series Resource Type Map Remove constraint Resource Type: Map Era Cretaceous Remove constraint Era: Cretaceous Region Powder River Basin (Wyo. and Mont.) Remove constraint Region: Powder River Basin (Wyo. and Mont.)
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