FIRST DAY OF ISSUE
U.S.POSTAGE 5°
ROCHS
1964
DOCTORS
S MAYO
FIRST DAY OF ISSUE
DR. CHARLES H.MAYO MAYO
1865-1939
SEP
DR.WILLIAM J. MAYO.
PRACTICE
EOUCATION
EARCH
MAYO
1861-1939
MINN
HONORIN G THE
Dodiors Mayo
THEY REVERED THE TRUTH
AND SOUGHT TO KNOW IT
Art Craft
STER
L YEAR
YEAR
FOUNDAT
