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- catalog description "Introduction -- Changes in the plant workweek from 1929 to 1976 and their relation to key ratios -- Reasons for changes in average weekly plant hours from 1929 to 1976 -- Concluding remarks.".
- catalog tableOfContents "Introduction -- Changes in the plant workweek from 1929 to 1976 and their relation to key ratios -- Reasons for changes in average weekly plant hours from 1929 to 1976 -- Concluding remarks.".