When Doctors Join UnionsCurrent and anticipated changes in this country's health care system are likely to add momentum to the physicians' union movement, according to Grace Budrys. She documents the emergence and development of the Union of American Physicians and Dentists (UAPD), founded in the San Francisco Bay area in 1972, and suggests it may be a harbinger of renewed organizing efforts throughout the country. Representing both salaried and private practice doctors, the