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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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82. Pumice and volcanic cinder in 1974.

83. Barite in 1974.

85. Cesium and rubidium in 1974.

87. Abrasive materials in 1974.

88. Gem stones in 1974.

89. Carbon black in 1974.