Description
Item Description:"March 1980."
"Data were collected in the National ambulatory medical care survey (NAMCS)... conducted yearly by the Division of Health Resources Utilization Statistics (DHRUS) of the National Center for Health Statistics (NCHS)"--Page 2 of cover.
Physical Description:1 online resource (v, 66 pages) : illustrations.
Bibliography:Includes bibliographical references (pages 23-24).