Measuring productivity in coal mining
Subtitle: a case study of multiple input measurement at the county level in Pennsylvania, 1919-1948.
Series: Industrial Research Dept., Wharton School of Finance and Commerce, University of Pennsylvania. Research report -- no. 13.; Research report (Wharton School. Industrial Research Dept.) -- no. 13.
Publisher: Industrial Research Dept., Wharton School of Finance and Commerce, University of Pennsylvania
Published: 1952
Place of publication: Philadelphia
Language: eng
Number of pages: 96
Subjects: Labor productivity -- Pennsylvania.; Coal mines and mining -- Pennsylvania.