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121“...Report of investigations (United States. Bureau of Mines) ;...”
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122by Belser, Carl“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1951
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123“...Report of investigations (United States. Bureau of Mines) ;...”
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124by Blade, O. C. (Oscar Carl), 1902-1985“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1951
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125by Wenger, W. J.“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1957
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126“...Report of investigations (United States. Bureau of Mines) ;...”
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127by Wilson, E. D.“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1957
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128“...Report of investigations (United States. Bureau of Mines) ;...”
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129“...Report of investigations (United States. Bureau of Mines) ;...”
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130“...Report of investigations (United States. Bureau of Mines) ;...”
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131by Allen, Glenn L.“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1945
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132by Hill, H. B.“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1949
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133by Riggs, C. H. (Calvin Harold), 1905-“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1949
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134by Allsman, Paul Trekell, 1898-“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1949
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135“...Report of investigations (United States. Bureau of Mines) ;...”
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136“...Report of investigations (United States. Bureau of Mines) ;...”
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137“...Report of investigations (United States. Bureau of Mines) ;...”
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138by Allsman, Paul Trekell, 1898-“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1949
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139by Hazen, Scott W.“...Report of investigations (United States. Bureau of Mines) ;...”
Published 1949
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140“...Report of investigations (United States. Bureau of Mines) ;...”
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