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Start Over You searched for: Author Mines Bureau Remove constraint Author: Mines Bureau Publish Year Decade 1970 - 1979 Remove constraint Publish Year Decade: 1970 - 1979

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51. Zirconium and hafnium in 1975.

52. Mercury in 1975.

53. Tin in 1975.

54. Antimony in 1975.

55. Gold and silver in 1975.

56. Lead in 1975.

58. Platium-group metals in 1975.

59. Selenium and tellurium in 1975.

60. Zinc in 1975.