1
Published 2002
U.S. Dept. of Health and Human Services, Public Health Service, Office of the Surgeon General

2
Published 1991
National Academy Press

3
Published 2002
U.S. Dept. of Health and Human Services, Public Health Service, Office of the Surgeon General

4
Published 1981
U.S. Dept. of Health and Human Services, Public Health Service, National Institutes of Health

5
Published 1987
U.S. Dept. of Health and Human Services, Public Health Service, National Institutes of Health

6
Published 1981
U.S. Dept. of Health and Human Services, Public Health Service, National Institutes of Health

7
by Nelson, Karin B.
Published 1981
Raven Press