Call Number (LC) Title Results
FW 4.7:E-3 Mechanization trends in metal and nonmetal mining as indicated by sales of underground loading equipment / 1
FW 4.7:E-4 Employment and related statistics of mines and quarries, 1935. Part I : bituminous coal / 1
FW 4.7:E-5 Fuel efficiency in cement manufacture, 1909-1935 / 1
FW 4.7:E-6 Grade of ore / 1
FW 4.7:E-7 Technology, employment, and output per man in phosphate-rock mining, 1880-1937 / 1
FW 4.7:E-8 Changes in technology and labor requirements in the crushed-stone industry / 1
FW4.7..E-9 Mechanization, employment, and output per man in bituminous-coal mining. 2
FW 4.7:E-9 Mechanization, employment, and output per man in bituminous-coal mining. 2
FW 4.7:E-9/ Mechanization, employment, and output per man in bituminous-coal mining / 1
FW 4.7:E-9/V.1-2 Mechanization, employment, and output per man in bituminous-coal mining / 1
FW 4.7:E-10 Technology, employment, and output per man in petroleum and natural-gas production / 2
FW 4.7:E-11 Rock drilling / 2
FW 4.7:E-12 Technology, employment, and output per man in copper mining / 2
FW 4.7:E-13 Technology, employment, and output per man in iron mining / 2
FW 4.7:E-14 Employment and income from gold placering by hand methods, 1935-37 / 2
FW 4.7:G-1 Unemployment and increasing productivity / 1
FW 4.7:G-2 The research program of the National Research Project / 1
FW 4.7:G-4 Effects of current and prospective technological developments upon capital formation / 1
FW 4.7:G-5 Industrial change and employment opportunity : -- a selected bibliography / 1
FW 4.7:G-5 Index Author index to industrial change and employment opportunity : a selected bibliography. 1