Brief illustrated item on activities in Ozark hills of Shannon County, Missouri; mining is still in experimental stage; shallow shafts; transportation difficulties; several carloads shipped have just about made expenses.
Ozark manganese
Explosives Engr
Explosives Engineer ; 20 , n 12
1942
Aufsatz (Zeitschrift)
Englisch
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America's Local Service Airlines, Part IV: Ozark, Pacific & Piedmont
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