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Incandescent light bulb - New World Encyclopedia
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Incandescent light bulb - Wikipedia
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Incandescent light bulb - Wikipedia
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Incandescent light bulb - Wikipedia
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Incandescent light bulb - Wikipedia
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Wikipedia on Twitter: "On this day in 1879: Thomas Edison invented the first commercially practical incandescent light bulb. https://t.co/iqlDRDk7Fp https://t.co/e5I2EYKGwB" / Twitter
