Health and demographic characteristics of twin births : United States, 1988.
Imprint
Hyattsville, Md. (6525 Belcrest Rd., Hyattsville 20782) : U.S. Dept. of Health and Human Services, Public Health Service, Centers for Disease Control, National Center for Health Statistics, 1992.
"National trends in twin birth incidence by race of child are analyzed for the period 1950-88. Also reviewed are maternal and infant health and demographic characteristics associated with twin delivery for the year 1988."