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1. Organization and course of study for evening classes in bituminous coal mining
Title:
Organization and course of study for evening classes in bituminous coal mining
Corporate Author:
Commonwealth of Pennsylvania Department of Public Instruction
Date:
1925
State/Country:
Pennsylvania
Subjects:
Coal mines and mining, Evening and continuation schools
2. Organization and courses of study in anthracite coal mining for mine foremen and assistant mine foremen
Title:
Organization and courses of study in anthracite coal mining for mine foremen and assistant mine foremen
Corporate Author:
Commonwealth of Pennsylvania Department of Public Instruction
Date:
1925
State/Country:
Pennsylvania
Subjects:
Coal mines and mining, Evening and continuation schools