First [-Fourth] Biennial Report of the Department of Labor and Industry

by Montana. Dept. of Labor and Industry (1913-1921)

1916

1913-1914 contains also "Report of inspector of quartz mines", 1913/14, "Report of state coal mine inspector", 1912-14, "Report of state boiler inspector", 1912/14, and an Official directory" (p. 259-276)