Columbia subject headings:
Harvard subject headings:
Breckinridge, Mary, 1881-1965
Frontier Nursing Service, Inc.
Frontier Nursing Service, Inc.--History.
Nurse administrators--Kentucky--Biography--History.
Nurse adminstrators--Kentucky--Biography--History.
Princeton subject headings:
Breckinridge, Mary, 1881-1965.
Frontier Nursing Service, Inc.--History.
Nurse administrators--Kentucky--Biography--History.