Physical description for original version: vi, 74 p. : 28 cm
書誌注記
Includes bibliographical references (p. 25-29)
原資料等に関する注記
原資料の出版事項: Hyattsville, Md. : U.S. Dept. of Health Human Services, Public Health Services, Center for Disease Control and Prevention, National Center for Health Statistics, 1995