Keywords: 1964USstampDoctorsMayo.jpg de US-Briefmarken zu Ehren William Worrall Mayo und William James Mayo 1964 en United States Postal Service 1964 postage stamp depicting Charles Horace Mayo and William James Mayo It was designed after a bronze statue of the Mayo brothers by James Earle Fraser fr portrait des deux docteurs Mayo sur un timbre postal des États-Unis émis en 1964 it Stampa dei dottori Mayo pl Znaczek pocztowy z wizerunkami braci Mayo Own Jonathunder 1964-09-11 Stamp was created prior to 1978 and is therefore public domain PD-USGov James Earle Fraser Groups of people on stamps Mayo Clinic Charles Horace Mayo William James Mayo 1964 stamps of the United States |