一般注記"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."
Shipping list no.: 92-0515-P
"June 1992."
Physical description for original version: iii, 17 p. : 28 cm
書誌注記Includes bibliographical references (p. 9)
原資料等に関する注記原資料の出版事項: 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
ISBN: 0840604637 (: )
SUPTDOC番号: HE 20.6209: 21/50
GPO管理番号: 0500-E