A survey of group practice in the United States, 1969.
D000367:Age Factors; D000574:American Medical Association; D003710:Demography; D006123:Group Practice / Q000600:supply & distribution; D006280:Health Workforce; D007348:Insurance, Health; D008511:Medicine; D010317:Partnership Practice; D011216:Practice Management, Medical; D013038:Specialization; D013223:Statistics as Topic; D014481:United States