Trends in Man-hours Expended Per Ton for the Manufacture of Fertilizer United States. Bureau of Labor Statistics Published: 1939 Total Pages: 136 Get eBook
Trends in Man-hours Per Ton United States. Labor Statistics Bureau Published: 1952 Total Pages: 20 Get eBook
Trends in Man-hours Expended Per Ton, Cane Sugar Refining United States. Bureau of Labor Statistics Published: 1939 Total Pages: 154 Get eBook
Trends in Man-hours Per Ton for the Manfacture of Selected Types of Fertilizer, 1939 to 1946 United States. Labor Statistics Bureau Published: 1948 Total Pages: 88 Get eBook
Trends in Output Per Man-hour in Mining United States. Bureau of Labor Statistics Published: 1935 Total Pages: 60 Get eBook
Man-hours Expended Per Ton, 1945 to 1949 United States. Bureau of Labor Statistics Published: 1952 Total Pages: 62 Get eBook
Technological Trends and National Policy United States. National Resources Committee. Science Committee Published: 1937 Total Pages: 400 Get eBook
