1. United States Department of Health, Education, and Welfare, Chart Book on Smoking, Tobacco, and Health, Public Health Services, Publication Number 1973, p. 9, June 1968.
2. United States Department of Health, Education, and Welfare, Facts: Smoking and Health, Public Health Service, Publication Number 72–7508, p. 1, September 1971.
3. STATUS OF SMOKING EDUCATION RESEARCH
4. HOW TEACHERS SEE THEMSELVES IN THE EXEMPLAR ROLE IN SMOKING EDUCATION AS EVIDENCED BY THEIR ATTITUDES AND PRACTICES
5. Wolfle D., Factor Analysis to 1940, University of Chicago Press, Chicago, p. 25, 1940.