1. US Department of Health, Education, and Welfare. Vital Statistics of the United States, 1950–60.
2. Increases in deaths from asthma;Sly;Ann Allergy,1984
3. Stabilization of asthma mortality;Sly;Ann Allergy Asthma Immunol,1997
4. Estimates of selected comparability ratios based on dual coding of 1976 death certificates by the eighth and ninth revisions of the International Classification of Diseases;Klebba,1980
5. Deaths: Final data for 1997;Hoyert;National Vital Statistics Reports,1999