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About the author
Editions

U.S. Dept. of Health and Human Services, Public Health Services, Office of Health, Research, Statistics, and Technology, National Center for Health Services Research
1980

U.S. Dept. of Health and Human Services, Public Health Services, Office of Health, Research, Statistics, and Technology, National Center for Health Services Research
1980

U.S. Dept. of Health and Human Services, Public Health Services, Office of Health, Research, Statistics, and Technology, National Center for Health Services Research
1980