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Corporate Names
Hanna Coal Company.
Remove constraint Corporate Names: Hanna Coal Company.
Date
1959/07
Remove constraint Date: 1959/07
Topical Subjects
Coal preparation plants.
Remove constraint Topical Subjects: Coal preparation plants.
Topical Subjects
Coal Mines and Mining--Preparation Plant Exteriors.
Remove constraint Topical Subjects: Coal Mines and Mining--Preparation Plant Exteriors.
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