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Start Over You searched for: Author Interior Dept. Remove constraint Author: Interior Dept. Catalog Issue Year Decade 1970 - 1979 Remove constraint Catalog Issue Year Decade: 1970 - 1979 Sudoc Stem I 28.139 Remove constraint Sudoc Stem: I 28.139

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1. Cesium and rubidium in 1975.

2. Cesium and rubidium in 1974.

3. Cesium and rubidium in 1974.