Cypress, Beulah K.
[Hyattsville, Md.] : [U.S. Dept. of Health and Human Services, Public Health Service, Office of Health Research, Statistics, and Technology], [1981]
1981
Cypress, Beulah 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 Statisitcs, [1981]
1981