Koch, Hugo K.
Hyattsville, Md. : U.S. Dept. of Health and Human Services, Public Health Service, Office of Health Research, Statistics, and Technology, National Center for Health Statistics, 1982.
1982
Park, Melissa.
Hyattsville, MD : U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Health Statistics, [2011]
2011
Website