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Start Over You searched for: Publisher Mines Bureau Remove constraint Publisher: Mines Bureau Publish Year Decade 1970 - 1979 Remove constraint Publish Year Decade: 1970 - 1979 Sudoc Stem I 28.83/2 Remove constraint Sudoc Stem: I 28.83/2

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1. Zirconium and hafnium in 1975.

2. Zirconium and hafnium in 1974.

3. Zirconium and hafnium in 1973.