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121
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122
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123
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124
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125
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126
Proposed plan of mining and reclamation, East Decker and North Extension mines, Decker Coal Company, Big Horn County, Montana.
Published 1977Government Document Book -
127
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128
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129
-
130
Geology of Rocky Mountain coal : proceedings of the 1976 symposium /
Published 1977Conference Proceeding Book -
131
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132
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133
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134
-
135
Federal coal management program: draft environmental statement /
Published 1978Government Document Book -
136
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137
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138
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139
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140