Shift systems -- Social aspects -- United States. / https://id.loc.gov/authorities/subjects/sh85121411 https://id.loc.gov/authorities/subjects/sh00002758 https://id.loc.gov/authorities/names/n78095330-781 : United States.
1984
1
4
Shift systems -- United States -- Physiological aspects. / https://id.loc.gov/authorities/subjects/sh85121411 https://id.loc.gov/authorities/names/n78095330-781 https://id.loc.gov/authorities/subjects/sh00005709 : United States.