US Department of Health, Education, and Welfare: Health Consequences of Shift Work. March 1978. DHEW (NIOSH) Publication No. 78-154. Washington, DC, Government Printing Office, 1978.
2.
US Department of Health, Education, and Welfare. Occupational Stress: Proceedings of the Conference on Occupational Stress Los Angeles, November 3, 1977. DHEW (NIOSH) Publication No. 78-156. Washington DC, Government Printing Office, 1978.
