Coal-Mine Fatalities in the United States, 1870-1914

Excerpt from Coal-Mine Fatalities in the United States, 1870-1914: With Statistics of Coal Production, Labor and Mining Methods, by States and Calendar Years

The Bureau of Mines, in carrying out one of the provisions of its organic act to Это и многое другое вы найдете в книге Coal-Mine Fatalities in the United States, 1870-1914