Characteristics of physicians.

Mode of access: Internet.Vol. for 1979- issued by U.S. Dept. of Health and Human Services, Public Health Service, Health Resources Administration, Bureau of Health Professions; <1985-> by U.S. Dept. of Health & Human Services, Public Health Service, Health Resources and Services Administration, Bureau of Health Professions, Office of Data Analysis and Management.Vol. for 1979- prepared by: Division of Survey and Data Resources, Division of Computer and Information Services, American Medical Association; <1985-> by Dept. of Data Release Resources, Division of Survey and Data Resources, American Medical Association