TY  - BOOK
AU  - Best,Ethel L.
TI  - A study of a change from one shift of 9 hours to two shifts of 6 hours each,
AV  - HD6093 .A35 no. 116
PY  - 1934///
CY  - Washington
PB  - U.S. Govt. print. off.
KW  - Hours of labor
KW  - Women
KW  - Employment
KW  - Fatigue
N1  - At head of title: U.S. Department of labor. Fransis Perkins, secretary. Woman's bureau. Mary Anderson, director
ER  -