'Cave-In', Colliers Weekly
Tags: 1940s; 1944; 1944-6-24; Coal mining; Earth Sciences; Henderson, Harry; Subsidence
'America goes back to work', Harpers
Tags: 1917; 1920; 1920-8-1; 1920s; Ariz.; Arizona; Bisbee; Coal mines and mining; Coal mining; Copper Miners� Strike; Copper mines and mining; Description and travel; Earth Sciences; Economic conditions; Farmers; Geology; Henry Justin Allen; Hungerford, Edward; Kansas; Kansas City; Kansas City (Kan.); Labor unions; Mexi
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