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Dr. George Papanicolaou
at
microscope
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Dr. Gnanaprakasar
Dr. Gerhard Hansen
Short desc: Dr. Gerhard Hansen
This design is used by 2 stamps:
(See all uses as list)
6/28/1973 40k
6/28/1973 80k
All are Laos issue=100th Anniversary of Identification of Leprosy Bacillus by Hansen
