United States Department of Health, Education and

Hindawi I. I., "Air Pollution Injury to Vegetation, AP-71. United States Department of Health, Education, and Welfare, Raleigh, NC, 1970. 

Source Pagnotto, L. D., and Keenan, R. G., "Sampling and Analysis of Gases and Vapoi - . f The Industrial En iniiimL-iit—ll Control." United States Department of Health, Education and Welfare. United States Government Printing Office, Washington. 167-179. 

Furman, Bess. "A Profile of the United States Public Health Service, 1798-1948" United States Department of Health, Education and Welfare Washington, D.C., 1973 pp. 308-311, 374. 

The United States Department of Health, Education and Welfare has developed a system for classifying toxins and other etiological agents on the basis of hazard. Depending on the level of hazard, the etiological agent can be placed in one of four biosafety levels. A brief description of these biosafety levels is given in Table 1. 

Davis, L.E., Neff-Davis, C.A. Baggot, J.D. (1973) Comparative pharmacokinetics in domesticated animals. In Research Animals in Medicine, (ed. L.T. Harmison), pp. 715-732. Publication No. (NIH) 72-333, United States Department of Health, Education and Welfare, Washington D.C. 

The subject of what evidence is necessary to conclude that an exposure is causally associated with disease has received much discussion over the years. In 1964, the seminal report to the Surgeon General on Smoking and Health [United States Department of Health, Education, and Welfare (DHEW 1964)] published criteia by which to evaluate whether an exposure was causally related to disease. These criteria were consistency, strength of association, specificity of the association, temporal relationship of the association, and coherence of the association. 

Ragan HA, Hackett PL, McClanahan BJ, et al. 1973. Pathologic effects of chronic 90Sr ingestion in miniature swine. In Harrison LT, ed. Research animals in medicine, [National conference on research animals in medicine], Washington, D.C. Jan. 28-30, 1972. Washington, DC United States Department of Health, Education, and Welfare, 919-929. 

United States Department of Health, Education and Welfare, National Heart Institute (1966) The Framingham Heart Study Habits and Coronary Heart Disease (PHS Publication No. 1515), US GPO, Washington, D. C. 

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