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Significant Books and Music of the Century, Year by Year  1930 was the year that the planet Pluto was discovered; a yellow-fever vaccine was developed; Constantinople became Istanbul; and flash powder was replaced by safer photo flashbulbs.
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Significant Books and Music of the Century, Year by Year 1930 was the year that the planet Pluto was discovered; a yellow-fever vaccine was developed; Constantinople became Istanbul; and flash powder was replaced by safer photo flashbulbs.
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