Production, employment, and productivity in the mineral extractive industries, 1880-1938
By: by Vivian Eberle Spencer. Work projects administration, National research project.
Series: National research project on reemployment opportunities and recent  changes in industrial techniques ... Studies of the labor supply, productivity, and production ... [Report no. S-2]
Published: 1940
Place of publication: Philadelphia, Pa
Language: eng
Number of pages: 168
Subjects: Labor and laboring classes -- United States; Mineral industries -- United States
Notes: Bibliographical foot-notes.
Photoprinted.