一般注記"February 1981."
G.P.O. sales statement incorrect in publication
Physical description for original version: iv, 49 p. ; 26 cm
書誌注記Includes bibliographical references
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 and Human Services, Public Health Service, Office of Health Research, Statistics, and Technology, National Center for Health Statistics, [1981]
ISBN: 0840601921
SUPTDOC番号: HE 20.6209: 23/6
GPO管理番号: 500-E