See History of Arizona medicine; collections of Orville Harry Brown, M.D. [AHSL Special Collections WZ 70 AA7 H673].
Arizona Medical Journal, May, 1916; 4:5, page 22: Dr. Marian W. Williams (Johns Hopkins, ’01), has opened her office for the practice of medicine in the O’Neill Bldg., Phoenix.
M. W. Williams, Hartford, Conn. The Feeding of Sick Children. Yale Medical Journal, May, 1909, p. 118ff.
J Am Med Assoc, Oct 1917; LXIX: 1451: Dr. Allen H. Williams has succeeded the late Dr. Harry J. James as medical director of St. Luke's Home for Tuberculosis, Phoenix. Dr. Marian Walker Williams, wife of Dr. Allen Williams, has been made assistant director.
Census of women physicians. American Women's Hospitals, 1918, page 5: Arizona. ... Williams, Marian W. ... 37 Holley St., Phoenix, Maricopa Co.