Dorothy Marsh was president of the California Osteopathic Association (COA) during the time it merged with the California Medical Association in 1962; before 1961, when the organization agreed to the merger, the osteopathic profession constituted 10% of the physicians and surgeons in California, and provided care for approximately 15% of the state's population; the doctors of osteopathy not accepting the merger formed an independent organization called the Osteopathic Physicians and Surgeons of California (OPSC) in Dec. 1960, just after the parent organization, the American Osteopathic Association, had voted to revoke the charter of the COA; the OPSC was then recognized by the American Osteopathic Association (AOA) in Jan. 1961.
From the description of California Osteopathic Association records, 1954-1965. (University of California, Los Angeles). WorldCat record id: 39450025
