phycisist

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Postage stamp Denmark, 1963. Nuclear phycisist Professor Niels Bohr portrait Royalty Free Stock Photo
Archimedes bust Royalty Free Stock Photo
AUSTRIA - CIRCA 1985: A stamp printed in Austria shows Josef Stefan, circa 1985. Royalty Free Stock Photo
AUSTRIA - CIRCA 1988: A stamp printed in Austria shows physicist and philosopher Ernst Mach, circa 1988. Royalty Free Stock Photo
   
   
   
Engineer, phycisit examining geometry
   
   
   
   
   
   
   
Engineer, phycisist examining the geaometry of differant gears and parts


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