00509oam 2200157z- 450 9910714539003321(CKB)3780000000322320(EXLCZ)99378000000032232020230509c1944uuuu -u- -engStudies of the effects of long working hoursUnited States Department of Labor, Bureau of Labor StatisticsWashington, D.CBOOK9910714539003321Studies of the effects of long working hours3328850UNINA